Questions Asked on
October 11, 2010

  1. Chemistry

    Washing soda is a hydrate of sodium carbonate. Its formula is Na2CO3 X xH20. A 2.714 g sample of washing soda is heated until a constant mass of 1.006 of Na2CO3 is reached. What is x? What is the experimental mass percent of water in the hydrate?

    asked by Doris
  2. chemistry

    The boiling point of water at 735mmHg is 99.073C. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000C. Kb for water = 0.510K kg mol-1.

    asked by Gina
  3. organic chem

    organic chemistry lab and why is water the first choice for recrystallization when all factors are equal?

    asked by sharon
  4. math

    need the reponse for this y=x3 y=9-x3 y=y x^3=9-x^3

    asked by Anonymous
  5. college

    organic chemistry lab and why is water the first choice for recrystallization when all factors are equal?

    asked by sharon
  6. MATH PLEASE HELP

    x = 2 , 4 , 6 , 8 y = 18, 34, 50, 66 This is supposed to be a table where the x lines up with the y in order How would I find the equation to solve this when x = 20? x goes up by +2 y goes up by +16 but starts with 18

    asked by Amy
  7. Algebra 2

    How do you simplify (x^3+x^2-x-1)/(x^3-x^2-x+1)?

    asked by danny123
  8. calculus

    Suppose that the radius r of a right circular cone of fixed height h = 20 cm is increasing at a rate 4 cm/s. How fast is the volume increasing when r = 10? Give your answer correct to two decimal places.

    asked by John
  9. Math

    There are 2 hats, 3 scarves, and 3 pairs of mittens How many different combinations of 1 hat, 1 scarf, and 1 pair of mittens? How would I solve this, other than writing out each combination? Could someone please explain how?

    asked by Amy
  10. English

    What does it mean by Australia's success is riding on the sheep's back?

    asked by Jannie
  11. math

    Number sence What is the number? It is greater than 43 and less than 52. If you add the digit, the sum is 8. write the number word. I need help figuring this out not just the answer but how to get the answer.

    asked by cheri
  12. HEATHCARE

    write a 1-2 page essay explaining how one of the following groups have addressed issues of cost control. healthcare, united states goverment and insurance

    asked by franklin
  13. Chemistry

    Consider the following reaction: CH4 +2O2 -> CO2 + 2H2O. Delta H = -891 kJ Calculate the enthalpy change for each of the following cases: a. 1.00 g methane is burned in excess oxygen b. 1.00 x 10^3 L methane gas at 740. torr and 25 *C is burned in excess

    asked by Anonymous
  14. chemistry

    Explain in words how you would prepare 250 ml of a 3.000 M solution of Ba(OH)2 starting from a two liter bottle of 12.000 M Ba(OH)2

    asked by lalo
  15. Chemistry

    Consider the combustion of propane: C3H8 + 5CO2 -> 3CO2 + 2H20. Delta H = -2221 kJ. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?

    asked by Anonymous
  16. maths

    1+1= wat?

    asked by justin beiber
  17. chemistry

    consider the following balanced chemical reaction: 2 Col3+3 K2S-> Co2S3+6 Kl assuming all that can react will react, how many grams of cobalt (III) sulfate will form when 1318.89 grams of cobalt (III) iodide are combined with 551.35 grams of potassium

    asked by kayla
  18. composition and communication 1

    i need to know how to write five sentences in which you address how your writing has changed in the first four weeks of class. the classis composition and communication 1

    asked by sarah
  19. 2nd grade

    What number am I My tens digit is double my ones digit. I am less than 70 greater than 60? How do u figure this out need help to explain how to get the answer..

    asked by cheri
  20. Math

    I need to divide 5/8 cup of buter into 12 servings

    asked by Nay
  21. sociology

    hi i would like to know if longitudinal study and participant observation is more or less the same thing??concerning their adv. n disadvantages???

    asked by Pallavi
  22. chemistry

    What is the energy of green light with a wavelength of 5.50x10^-7m?

    asked by riley
  23. Chemistry

    In a car engine, gasoline (represented by C8H18) does not burn completely, and some CO forms along with CO2 and H2O. If 5 percent of the gasoline forms CO, A)What is the ratio of CO2 to CO molecules in the exhaust? B)What is the mass ratio of CO2 to CO?

    asked by Daniel
  24. English

    The swimming strokes of the woman were jerky. Is this the correct verb to use in this sentence? The Subject is plural not so, so the verb must be plural too!

    asked by Kathleen
  25. calculus

    Find dy/dx 4x^2+y^2-8x+4y+4=0, find points on graph of the equation where there is a vertical or horizontal tangent line

    asked by tia
  26. Calculus

    Inflection points of y= x/ x^2 + 25

    asked by jenn
  27. calculus

    c be the curve of the equation y=3x^5+10x^4-10x^3+60x^2+25x-5. among all points on the curve over the interval [-1,3], find the coordinates of the highest slope and lowest slope

    asked by ruth
  28. Chemistry

    Name some advantages of using acetaminophen instead of aspirin as an analgesic

    asked by Mohammed kubaja
  29. chemistry

    how to dilute 7.75g of conc. HCl in 1000cm3?

    asked by denice
  30. physics

    A 1-kg mass hangs by a string from a disk with radius 5.1 cm which has a rotational inertia of 5 × 10-5 kg•m2. After it falls a distance of 1.4 meters, how fast is it going? What is the angular velocity of the disk?

    asked by sandhya
  31. COM 156

    Help with writing an outline on renting vs buying

    asked by James
  32. Calc

    find the cubic equation that has a y intercept of (0, -4) and has roots at x=1, x=2, and x= -5

    asked by Anonymous
  33. social studies

    Followed for one hundred years, one model for creating new territories was?

    asked by Anonymous
  34. Math - Derivative of a polynomial function

    A flaming arrow is shot into the air to mark the beginning of the a festival. Its height, h, in meters after t seconds can be modelled by the function h(t)=-4.9t^2+24.5t+2 How fast is the arrow traveling when it hits the ground? Explain how you arrived at

    asked by Anonymous
  35. English

    1. I am looking forward to my next visit there. 2. I am expecting my next visit there. 3. I am anticipating my next visit there. (Are they all the same and grammatical? What is the part of speech of 'there'?)

    asked by rfvv
  36. English

    1. I was moved enough to want to help her. ( Is this grammatical?) 2. I was all wet after I washed only the first dog. (Does 'all' mean 'completely' here?) 3. Today was best. 4. Today was the best. (Which one is grammatical?)

    asked by rfvv
  37. English

    1. At the end of the day, I was very tired but happy. (What is the opposite of 'at the end of'? Is it 'at the beginning of' or 'in the beginning of'?)

    asked by rfvv
  38. geometry

    Two triangles are similar: the first has a base of 12 feet and a height of 16 feet; the second has a base of 9feet. What is the height of the second triangle?

    asked by Shay
  39. GEOMETRY

    Alicia is 5ft tall. she casts a shadow that measures 6 1/2 feet long at the same time that a sculpture in the park casts a shadow 12 ft long. which of the following is the approximate height of the sculpture? a) 2.0 miles b) 6.6 miles c) 12 miles d) 15.6

    asked by Tiffany
  40. Happy Thanksgiving Canada

    Happy Thanksgiving to my fellow Canadian tutors and to the Canadian students at Jiskha.

    asked by Reiny
  41. ENGLISH

    What criteria do you suggest I make for my evaluation paper? My topic is that the school's celebratory bonfire for the basketball championship is a waste of time.

    asked by JOE
  42. math

    the coordinates of triangle KLM are K(-2,-5), L(0,1), M(6,-2) What type of triangle is KLM? A) obtuse isosceles B) acute scalene C) right isosceles D) right scalene

    asked by Tiffany
  43. Math

    A sequence of numbers is defined by the expression a(subscript n) = 3n + n^2 Which sequence corresponds to this expression? A)4, 9, 12, 20 B)4, 10, 18, 28 C)4, 10, 15, 20 D)5, 10 ,15 20 Question: What am I supposed to do here? How would I solve this?

    asked by Amy
  44. intro to chemistry

    The air in a 5.00L tank has a pressure of 1.20atm. What is the new pressure of the air when the air is placed in tanks that have the following volumes, if there is no change in temperature? A. 1.00L B. 2500ml C. 750ml

    asked by david
  45. intro to chemistry

    A sample of nitrogen has a volume of 50.0L at a pressure of 760mmHg. What is the volume of the gas at each of the following pressures if there is no change in temperature? A. 1500mmHg B. 2.0atm C. 0.500atm

    asked by david
  46. math

    when a marble hits a wall at a 22 degree angle, what is the measure of the angle between the two paths of the marble?

    asked by andy
  47. Physics

    To store the energy produced in 1.5 hour by a 160 MW (160 10^6 W) electric-power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Assume the upper reservoir is 500 m above the lower and we can neglect the

    asked by Emily
  48. math

    marcias house is approx. 10 miles east of the airport. a jet is flying directly over her house after taking off from the airport and flying approx. 12 miles. approx how many miles high is the jet when it flys over marcias house?

    asked by andy
  49. Math

    x = 2 , 4 , 6 , 8 y = 18, 34, 50, 66 This is supposed to be a table where the x lines up with the y in order How would I find the equation to solve this when x = 20? x goes up by +2 y goes up by +16 but starts with 18 I already posted this and got the

    asked by Amy
  50. geometry

    A manufacturer wants to make a rectangular storage box with volume 0.75 cubic meters, length 1.5 meters and width 0.4 meters. What is the height of the box?

    asked by Tiffany
  51. math

    Erica took 2 days to drive 1,020 miles. On the first day she drove 10 hours at an average spped of 62 mile per hour. on the second day, her average spped was 57 miles per hour. approx. how long did she drive on the 2nd day?

    asked by Tiffany
  52. organic chem

    7. An unknown compound, C8H14, is optically active. Hydrogenation of the unknown yields 4-methylheptane. Ozonolysis of the unknown yields ethanol and 2- methylpropandial. Suggest a structure for the unknown consistent with the above date. please help

    asked by josh
  53. differentiation

    Find y''(x) if y=(x)^1/2 tan (x)^1/2

    asked by Anonymous
  54. diploma in pre school

    Hi, can u pls check the english i used in my assigment is correct? if not pls correct and tell me where is my weekness. T/C INITIAL - K T/C SEX - Male T/C AGE - 3.8 yrs SETTING - Painting area & Jigsaw table area. PEOPLE - 1 Targeted child T/C - 3

    asked by ssebby
  55. math

    how do yu find the implicit differentiation for this porblem 4cosx*siny=1

    asked by help
  56. chemistry help

    enzymes and substrates overall reaction: S -> P step 1: E + S -> ES fast step 2: ES -> E + S fast step 3: ES -> E + P slow what is the order of the reaction in E and what is the order of reaction in S?

    asked by von
  57. English

    Can you please check if everything is correct? 1) The last decades of the 18th century were characterized by enormous changes, (witnessed enormous changes?) which turned Britain from a mainly farming country toan industrial one. 2)In particular, there was

    asked by Franco
  58. physics

    A 0.80-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.7 m on a frictionless horizontal surface.If the cord will break when the tension in it exceeds 90 N, what is the maximum speed the ball can have? Express your

    asked by james
  59. math

    a group of 25 students, 17 have socks on their feet, 12 have shoes on their feet, and 9 have both socks and shoes on their feet. how many students are barefoot

    asked by Judy
  60. Calculus

    Consider the region bounded by the curves y=e^x, y=-e^x, and x=1. Use the method of cylindrical shells to find the volume of the solid obtained by rotating this region about the y-axis.

    asked by John
  61. Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.

    asked by Mike
  62. Chemistry

    Calculate the molality of CsCl in a 18% by mass aqueous solution. Answer in units of m.

    asked by Mike
  63. Chemistry

    When 0.016 moles of lead(II) nitrate are dissolved in enough water to make 748 mililiters of solution, what is the molar concentration of nitrate ions? Answer in units of M.

    asked by Mike
  64. Chemistry

    What mass of MgSO4 · 7H2O is required to prepare 800 mL of a 0.442MMgSO4 solution? Answer in units of g.

    asked by Mike
  65. math

    f(x) = x+3 if x < equal to -3 4 if x > -3 1. lim x-> -3 from the left 2. lim x-> -3 from the right I need a specific point for each limit.

    asked by Marshall Mathers
  66. math

    what is the horizontal limits of : (10x^3-11x^2-2x)/(7-8x^3)

    asked by Marshall Mathers
  67. REACTION STEPS AND MECHANISM FOR [CO(NH4)3CO3]NO3

    (NH4)2CO3 + NH3+[CO(OH2)6](NO3)2+H2O2

    asked by ALEXELBIANCONERO
  68. MATH

    How can you determine if two lines are perpendicular? · How the slopes of two perpendicular lines relate; · How you recognize if two lines are perpendicular on a graph; · How you recognize if two lines are perpendicular simply from their equations.

    asked by Anonymous
  69. physics

    A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s. Determine the normal force exerted by the road on the car. Determine the normal force exerted by the car on the 72-kg driver. Express your answer

    asked by elizabeth
  70. health

    how does socioeconomics and educational opportunity are main reason for health disparities?

    asked by James
  71. math

    what is the domain of this function in interval form: 1/(5x^3-6x)

    asked by Marshall Mathers
  72. Chemistry

    HNO3+NaOH --- H2O+NaNO3 What is formed in the solution besides Cu(OH)2?

    asked by Ashley
  73. To Canadiens

    Happy Thanksgiving/ un heureux jour de l'action de grâce.

    asked by E.G.
  74. business

    q:what kind of economic system does france have? a:france has a mixed economy q:Does France import more than they export or export more than they import? a:export more than they import q:Is france part of a large economic system? a:yes. are these answers

    asked by Rebecca
  75. earth space science

    A substance that cannot be broken down into simpler substances by physical or chemical needs is called an

    asked by Ariel
  76. 11th grade

    When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 5.3 m/s2 as it slows from 9.5 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s

    asked by leigha
  77. physics

    A car traveling at 7.3 m/s accelerates 4.5 m/s2 to reach a speed of 11.0 m/s. How long does it take for this acceleration to occur? Answer in units of s.

    asked by leigha
  78. physics

    as a hiker descends a hill, the work done by gravity on the hiker is a.) positive and depends on the path taken b.) negative and depends on the path taken c) positive and indepedent of the path taken d.)negative and independent of the path taken

    asked by tina
  79. physics

    If a loaded truck that can accelerate at 1 m/s2 loses its load and has four-fifths of its original mass, what acceleration can it attain if the same driving force acts on it?

    asked by Anonymous
  80. Math/English?

    Hey! How's it going? Can anyone help me out here? My teacher asked us students to come up with a mnemonic device for PEMDAS (you know, the order of Operations), other than Please Exuse My Dear Aunt Sally. I came up with great ideas, but she changed her

    asked by Anonymous
  81. Health Information

    Dr. Bob's computerized records are damaged by a power surge. Which of the following is most true? A. Dr bob isn't at fault. B. Dr Bob is at fault. C. The records custodian, but not Dr bob will be liable. D. Dr Bob is at fault unless he had proper surge

    asked by Denise
  82. biology

    Hello, I was just wondering what the difference between anatomical and physiological. I'm reading a reserach paper that talks about how light levels 'involve both physiological and anatomical changes to the leaves.' I don't know what the difference between

    asked by moi
  83. Limits

    F(x)= 11 if x > 10 4 if x = 10 -x+11 if 0 < equal x < 10 11 if x 10 from the left 2. lim x-> 10 from the right 3.lim x-> 0 from the left 4. lim x-> 0 from the right 5. lim x-> 0

    asked by Marshall Mathers
  84. MATH

    Post your 50 or more word response to the following in the assignment link: How can you determine if two lines are perpendicular? Your response should include the following: · How the slopes of two perpendicular lines relate; · How you recognize if two

    asked by Anonymous
  85. business

    France is an independent nation in Western Europe and the center of a large overseas administration. It is the third-largest European nation (after Russia and Ukraine). In ancient times France was part of the Celtic territory known as Gaul or Gallia. Its

    asked by Rebecca
  86. physics

    What force is needed to accelerate a child on a sled (total mass = 65.0 kg) at 1.75 m/s^2

    asked by Katie
  87. Physics

    A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of 345 m/s? The answer is

    asked by Alina
  88. us history

    Distinguish between "older culture" and "new culture" present in 18th century colonial America, and discuss the value conflict that emerged between the two.

    asked by Josh
  89. physics

    A hypothetical planet has a radius 1.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? Express your answer using two significant figures.

    asked by sarah
  90. Chemistry

    Balance? Cr2O7^2- + C2H4O yields C2H4O2 + Cr^3+ (When I say ^ a number followed by a plus or minus that's the charge) Half-reaction method needed.

    asked by Alex
  91. Physics

    What average force is required to stop an 1600 -kg car in 8.0 s if the car is traveling at 80 km/h?

    asked by Katie
  92. Physics

    What average force is needed to accelerate a 8.00-gram pellet from rest to 135 m/s over a distance of 0.800 m along the barrel of a rifle?

    asked by Katie
  93. PHYSICS ---HELP!

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by Jen
  94. chemistry

    The weight of an atom is made up of what? protons and electrons neutrons protons electrons neutrons protons electrons and neutrons

    asked by kaiya english
  95. Chemistry

    Assignment  Calculate the pH, pOH, [H+], and [OH] for each of the following solutions. Show all work. (10 Points) Solution Composition of Starting Materials 1 0.10 M acetic acid 2. 5 mL 0.10 M acetic acid + 5 mL wa 3 1 mL 0.10 M acetic acid + 99 mL

    asked by Brian
  96. Intermediate Algebra (Math)

    HELP PLEASE, Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -2x Ð 8y = 22 -6x Ð y = 20 At first I tried to multiply by 8 but that did not work.

    asked by Lyri
  97. Intermediate Algebra

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -7x Ð 5y = 1.5 -5x Ð 4y = 4.5

    asked by Jordyn
  98. Algebra (Intermediate)

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 9x + 6y = 60 -27x Ð 18y = -180

    asked by JerryJ
  99. Intermediate Algebra

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x + y = 4 x + 3y = 22 Here's what I came up with (where did I go wrong) -3x + y = 4 y = 4 - 3x -3x + (4-3x) = 4 -3x + 1x =

    asked by Jordyn
  100. algebra I

    What is 3/4x-7=8+-6x

    asked by Samantha
  101. geometry

    Julian is interested in building a new house. Three architects have given him plans. The first plan is for a house that will be 2,250 square feet. The total cost of the house will be $281,250. The second plan is for a house that will be 2,400 square feet.

    asked by kaitlynne
  102. math

    find an equation of the line passing through the given points. Write the equation in function notation (4,5) and (2,9) f(x)=

    asked by Anonymous
  103. Marketing

    ______________ is the process of naming broad product-markets and then segmenting these broad product-markets in order to select target markets and develop suitable marketing mixes. A. Strategic planning B. Market positioning C. Market segmentation D. Mass

    asked by Yvonne
  104. AP Chem

    A student chemist named Hannah Montana set up an electrical conductivity tester similar to that shown on page 141 and conducted an experiment involving two clear, colorless liquids, identified as solution A and solution B. Solution A and Solution B are

    asked by dylan
  105. chemistry

    what is the atomic number of an atom X which has 14 protons 14 electrons and 12 neutrons? 2 14 12 26

    asked by kaiya
  106. English 2

    12. All of the following words describe Sir Lancelot Du Lake except a. loyal b. indirect c. strong d. clever B? 13. What is the most likely reason that Sir Lancelot doesn't initially fight the three Round Table knights at the end of the story? a. Sir

    asked by mysterychicken
  107. chemistry

    what is the atomic weight of an atom x which has 14 protons 14 electrons and 12 neutrons 2 14 12 26

    asked by kaiya
  108. math

    fill in the missing digits in as many ways as possible so the number will be divisible by 6. 3_2_ I am confused on this.

    asked by m
  109. chemistry

    the weight and charge of and electron is respectively o and -1 1 and 0 1 and -1 0 and +1

    asked by kaiya
  110. chemistry

    an atom of cesium cs has 55 protons 55 electrons and 77 neutrons true false

    asked by kaiya
  111. chemistry

    carbon -12 and carbon -14 are the exact same atom isotopes of the same atom completely different atoms the same except that carbon -14 has 2 extra electrons

    asked by kaiya
  112. chemistry

    how many proton and electrons does Fe+2 have? 26 protons 26 electrons 26 protons 28 electrons 26 protons 24 electrons 24 protons 26 electrons

    asked by kaiya
  113. chemistry

    Sodium, Na+1 and chlorine Cl-1 often react together to form a molecule they do this because sodium gives an electron away chlorine picks up the electron chlorine gives an electron away sodium picks up the electron they are near each other on the periodic

    asked by kaiya
  114. chemistry

    how many electrons does se-2 have 32 34 36 2

    asked by kaiya
  115. chemistry

    how many protons does se-2 have 32 34 36 2

    asked by kaiya
  116. algebra 1

    what is means?

    asked by china
  117. science

    A steel wire is tied to two chairs and kept taut. 2 students sit one on each chair. A weight is attached to the long wire with help of a string and a pointer is attached to the weight to show the reading. What will happen to the arrow when candles are lit

    asked by pricilla
  118. physics

    which of the following MUST necessarily happen if work is done: a. energy must be released b. energy must be used c. energy must be converted from one form to another d. it is not necessary that any of these Must happen

    asked by pricilla
  119. science

    A few clips made of magnetic material are placed in a container and a magnet attracts the clips from outside the container. Which of these must be true about the material of which the Container is made : a. It should be a metal b. It should be a non-metal

    asked by pricilla
  120. Finance Question

    Nathans Hot Dog Corp has projected the following sales for the coming year: Q1 Q2 Q3 Q4 Sales $ 700 $ 850 $ 950 $ 1,050 Sales in the year following this one are projected to be 17 percent greater in each quarter. Calculate payments to suppliers assuming

    asked by Trevor
  121. english

    whats another way of saying "set your heart at rest" ?

    asked by Rebecca
  122. physiology

    Need help with this one, can't really locate the answer. Consider the bifurcation of a vessel at 20 degrees from the line of blood flow (region a) and a vessel that gives off two vessels at 90 degrees from the main stream of the vessel (region b). Which

    asked by marco
  123. college

    How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?

    asked by klarisa
  124. Algebra (Intermediate)

    5. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 9x + 6y = 60 -27x Ð 18y = -180 Here's where I am at now: 9x(3) + 6y(3) = 60 27x +18y + 60 27 x + 18y = 60 -27x -18y = 180

    asked by JerryJ
  125. physics

    Sally travels by car from one city to another. She drives for 30.0 min at 80 km/h, 12 min at 105 km/h, and 45 min at 40 km/h. She spends 13.0 min eating lunch and buying gas. what the average speed for the trip?

    asked by Anonymous
  126. 4th grade

    On the average your heart beats about 72 times per min. At this rate, about how many times will it be 30 days in a year in your lifetime if you live to be 72?

    asked by me
  127. Foreign Language Classes

    Where are Foreign Language Schools in Amritsar ?

    asked by Shikha Kapoor
  128. Physics

    what do you call the source of an intense narrow beam of coherent monochromatic light?

    asked by Jennifer
  129. english

    it's discrimination to mandate that police officers must conform to a certain height and weight. which fallacies is this?

    asked by April
  130. chemistry

    Use bond energies to predict the molar enthalpy of combustion of acetylene gas. 2C2H2 + 5O2--> 4CO2 + 2H2O I am confused as to how to do the 2C2H2 in relation to the bonds? how many c-c bonds would there be, or would they be triple bonds?

    asked by ben
  131. physics

    A 3.00 kg book is dropped from a height of 2.2 m. The acceleration of gravity is 9.81 m/s2 . a) What is its acceleration? Answer in units of m/s2.

    asked by kayla
  132. Chemistry

    .924moles of A(g) is placed in 1L at 700C where 38.8% dissociated when equilibrium was established. 3A 5B + 2C What is the value of the equilibrium constant at the same temperature? I keep getting .022

    asked by Anonymous
  133. Algebra

    What is the domain of the function f(x) = square root of (12x-24) I don't get this concept and I have a ton of these problems-can you please explain how to get it Thank you

    asked by Tim
  134. Algebra

    what is the probability of pulling a spade from two decks of cards?

    asked by Rangy
  135. physics

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by angela
  136. English 2

    What was the lesson taught in "Abraham and Isaac"? Thanks -MC

    asked by mysterychicken
  137. english

    I need to write an introduction of an essay about food

    asked by Tracy
  138. physics

    A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s. Determine the normal force exerted by the road on the car. Determine the normal force exerted by the car on the 72-{\rm kg} driver.

    asked by angela
  139. PHYSICS H!!!!

    NOT SURE WUT I M DOING WRONG--- SO HEREZ THE ? PLEEZE HELP ME!!! ----A projectile is shot from the edge of a cliff h = 225 m above ground level with an initial speed of v0 = 155 m/s at an angle of 37.0° with the horizontal Determine the range X of the

    asked by Kavi
  140. Economics

    The Largo Publishing House uses 400 printers and 200 printing presses to produce books. A printer's wage rate is $20, and a printing press costs $5,000. The last printer added 20 books to total output, while the last press added 1,000 books to total

    asked by Nicole
  141. math

    Find the slope intercept equation of the line that has the given characteristics? slope 5,3 and y-intercept (0,-9).

    asked by Anonymous
  142. physics

    what kind of information is indicted by a graph of the acceleration due to gravity versus ball's mass if the slope of the curve is zero?

    asked by Jay
  143. statistics

    SUPPOSE A URN CONTAINED 3 RED, 6 BLACK, 5 BLUE, 2 YELLOW AND 4 GREEN MARBLES. WHAT IS THE PROBABILITY OF DRAWING A BLUE MARBLE?

    asked by CLARICE
  144. chemistry

    URGENT!! You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution?

    asked by Martin
  145. Physics

    A bullet with a mass of 0.01kg is fired horizontally into a block of wood hanging on a string. The bullet sticks in the wood and causes it to swing upward to a height of 0.1m If the mass of the wood block is 2kg, what is the initial speed of the bullet?

    asked by Amanda
  146. physics

    The force on a wire is a maximum of 7.33E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on.

    asked by VJC
  147. crim j

    Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new

    asked by ash
  148. physics

    A high-voltage power line carries a current of 120 A at a location where the Earth's magnetic field has a magnitude of 0.577 G and points to the north, 70.8° below the horizontal. Calculate the magnitude of the magnetic force exerted on a 258 m length of

    asked by VJC
  149. physics

    Protons move in a circle of radius 4.10 cm in a 0.570 T magnetic field. What value of electric field could make their paths straight?

    asked by VJC
  150. physics

    A proton with a kinetic energy of 5.00E-16 J moves perpendicular to a magnetic field of 0.289 T. What is the radius of its circular path?

    asked by VJC
  151. Physics

    Two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Each charge is 3.0E-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?

    asked by Bob
  152. Chemistry

    Hi I need help with the AXmEn classification of Acetic Acid.

    asked by Anonymous
  153. english

    Fix these questions if they are incorrect. If they aren't, just leave them alone. 1. To change the tire, John rose the wheel with a jackhammer.

    asked by Mitchell
  154. Statistics

    What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics?

    asked by Kathy
  155. algebra

    -108-9j I think you just add nine to the -108 and then that's it?

    asked by Allyson
  156. Statistics

    How do insurance companies use descriptive statistics and probability distributions to project health and auto insurance premiums? In regards to age, why is there an inverse relationship between the two (health and auto insurance) premiums?

    asked by Kathy
  157. physics

    In the simulation above the motion continues for 3 seconds. If the object travels a distance of 21.3 m in that time determine: (a) the acceleration of the object during the 3 second period, (b) the maximum speed of the object during the 3 second period.

    asked by Sam
  158. english

    we are supposed to write this passage from "a midsummer night's dream" in our own words: Set your heart at rest The Fairyland buys not the child of me His mother was a vot'ress of my order And in the spiced Indian air by night Full often hath she gossip'd

    asked by Rebecca
  159. Physics

    Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15 a)Calculate the acceleration of the system. b)

    asked by Syl
  160. college

    Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new

    asked by ash
  161. Physics, relativity

    I read this in a write-up of an experiment using atomic clocks: To reveal these effects, required the use of highly accurate atomic clocks, calibrated to check that they are perfectly in sync with each other – ticking down the nanoseconds (that's one

    asked by charlie
  162. Calculus

    f(x) = 6(cos(x))^2 - 12sin(x) 0 ¡Ü x ¡Ü 2(PI) I have to find where the interval is increasing, decreasing, local mins and maxs, inflection points, and concave up and down. I understand how to do these type of problems. I am just getting messed up with

    asked by Calculus
  163. Business

    Research the Goldman Sachs website. Using your research findings from the Library and the Internet, develop both an EFAS (External Factors Analysis Summary) table and an IFAS (Internal Factors Analysis Summary) table. The tables are to be submitted in one

    asked by Mandy
  164. math

    Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to and different from adding polynomial expressions? Provide a radical expression for your classmates to simplify. In your own

    asked by Abigail
  165. algebra

    187=-17R How exactly would I solve this? Would you divide the 187 by the -17?

    asked by Allyson
  166. organic chemistry

    a 50% aqueous solution of ethanol (50mL total) is distilled and collected in 10-mL fractions. Predict the boiling range of each fraction

    asked by Steph
  167. Math

    There is a three diget number round to the nearest hundred to 200. Round to the nearst 10 this number round to the sum of digits of the number is sum is 19. What is this number?

    asked by Tynia
  168. 8th grade science

    why are neuclar waste products a problem?

    asked by jess
  169. Algebra-Pleasehelp-I'm so stuck!!

    Please help How do you graph the radical that is below negative of the sqrt(x+1) my teacher said we should set up x and y according to parent function. The endpoint of this would be (-1,0) How do I find the other points-I'm really stuck

    asked by Julia
  170. Chemistry

    Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what

    asked by Michelle
  171. math

    what are all the fact families of 3, 4, 7, 10, 11. i'm not to sure how to answer this question. can anyone help please

    asked by jazmin
  172. Chemistry PLEASE HELP!

    When 0.042 moles of aluminum sulfate are dissolved in enough water to make 763 milliliters of solution, what is the molarity of sulfate ions? Answer in units of M.

    asked by Mike
  173. science

    how do I make a simple model cell?

    asked by claire
  174. chemistry

    theoretical percent sulfate in AlK(SO4)2*H2O

    asked by thomas richards
  175. Algebra 1

    1/4 x (7+3g)= - g/8 please help

    asked by Sabrina
  176. Pre Calc

    How to solve the equation: 36x-15y+50z=-10 2x+25y=40 54x-5y+30z=-160

    asked by Jerry
  177. physics

    a 60kg man is on a steadily rotating Ferris wheel. the man is standing on a bathroom scale and the scale reads 45kg at the top of the wheel. take g=10m/s^2 (a) what does the scale read when the man is at the bottom of the wheel? (b)what does the scale read

    asked by Ashley
  178. chemistry

    If a hydrated salt is overheated and the anhydrous salt thermally decomposes, one product being a gas, how will it affect the percent of water in the hydrated salt? explain.

    asked by Anonymous
  179. Systems Operations

    Your boss has asked you to help new employees understand uses of data in systems-operation management and the various statistical process controls they will experience on a daily basis. Create a 6 – 8 slide PowerPoint® presentation in which you describe

    asked by dena
  180. algebra

    7=T/-7 How on earth would I solve this?

    asked by Allyson
  181. math help

    find an equation of the line passing through the given points. Write the equation in function notation (4,5) and (2,9) f(x)=

    asked by Anonymous
  182. government

    why does the constitution not refer to local government?

    asked by karin
  183. English

    I really need you to check these sentences on the Industrial Revolution. Thank you very much. 1)The second half of George III’s reign saw England engaged in the long struggle against Napoleon to save her own independence and the freedom of the various

    asked by Franco
  184. physics

    I did a lab experiment where we verify Newtons second law experimentally. A glider moves along a frictionless air track and is attached to a hanging mass. We vary the hanging masses and calculate the force since we have the mass and acceleration. We have

    asked by physics lab help
  185. Chemistry

    What mass of MgSO4 · 7H2O is required to prepare 800 mL of a 0.442MMgSO4 solution? Answer in units of g. Would you use the formula M1V1=M2V2?

    asked by Mike
  186. Math

    Solve each higher degree equation by factoring. The answers are suppose to be 0,-12, -1/2 2x^4+25x^3+12x^2=0

    asked by Justine
  187. spanish

    what does detras mean in spanish?

    asked by Anonymous
  188. AP Chemistry

    The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg,

    asked by Emma
  189. government

    how does the national government's relationship to the states differ from the states' relationship to local government?

    asked by k
  190. math

    write an equation of the line containing the given point and parallel to the given line (7,9);x+7y=4

    asked by Anonymous
  191. Chemistry

    A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.37 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the

    asked by May
  192. physics

    An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.6 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the

    asked by jessy
  193. Physics

    A person walks 3.0847x10^1 m East, then turns around and walks 8.677x10^0 m West. The total time to walk this distance was 7.8624x10^2 s. What is the speed of the walker, expressed to 3 significant figures? please help me im so confused

    asked by annonomus
  194. algebra

    -11=z/-2 Does this mean that I multiply the -2 by -11 and then what?

    asked by Allyson
  195. chemistry

    a titration is done with with 25.00 mL of a .1500 M HBrO solution is titrated with .1025 M NaOH. Ka for HBrO= 2.0 x10^-9. The pH of HBrO before the titration begins is approx. closest to which of the following a. 0.82 b. 4.76 c. 8.70 d 10.60 e. 13.01 the

    asked by anon
  196. college

    I need help sketching the graph of 2sqrt(x)-x using differentiation

    asked by Nicole
  197. 10th grade(world history)

    How did the obedience to 10 commandments influence the ideas of the Social Contract?

    asked by Jazmyne
  198. Physics

    The battery in the circuit diagram has an EMF of 12V and an unknown internal resistance r. Voltmeter V1 is connected across the battery and voltmeter V2 is connected across the switch S. The resistance of the connecting wires and the ammeter is negligible.

    asked by Jennifer
  199. Physics

    The battery in the circuit diagram has an EMF of 12V and an unknown internal resistance r. Voltmeter V1 is connected across the battery and voltmeter V2 is connected across the switch S. The resistance of the connecting wires and the ammeter is negligible.

    asked by Jacqui
  200. Physics

    Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

    asked by Jason
  201. college physics

    Imagine that your car can travel 25 mi on 1 gal of gas when traveling on a level road at 55mi/h. Estimate your gas mileage while traveling at 55 mi/h up an incline that gains 3m in elevation for every 100 m one goes forward along the incline. Assume that

    asked by Tommy
  202. physics

    A block is projected up a frictionless inclined plane with initial speed v0 = 1.92 m/s. The angle of incline is è = 12.2°. (a) How far up the plane does it go? (b) How long does it take to get there? (c) What is its speed when it gets back to the bottom?

    asked by jessy
  203. world history

    1. How would you explain the similarity between Christian idea to share for the well being of the community and Rousseau’s general will/ environment shapes peoples behavior? and 2. How did ancient Greek philosophers and French philosophers ideas of the

    asked by Jazmyne
  204. Physics

    Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

    asked by Jason
  205. Chemistry

    A gas mixture contains 1.16 g N2 and 0.89 g O2 in a 1.49 L container at 16 degrees C. What is partial pressure of N2 & O2? *I already know the mole fraction for N2 is 0.60, and 0.40 for O2. I just don't know where to go from here.

    asked by Michelle
  206. Physics #2

    A car can decelerate at -3.40 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 14° uphill? Assume the same static friction coefficient.

    asked by Jason
  207. Physical science

    The photo-electric effect has many practical applications.A photocell, used in burglar system such application.The work function of the metal used as a cathode in the photocell is 8,7 times 10^-19J. Calculate the velocity at which the electrons are

    asked by Tamara
  208. English

    Need help with my story. Please check if my Anecdote is story or merely a report,second paragraph anazlyze the anecdote, explaining how illustrates the thesis. How can I make my essay 1000 words long? Thank you. sorry its kind a long questions. My quote is

    asked by Lindah
  209. social studies

    how would you describe the 1901-2000

    asked by ferry
  210. Algebra

    A dehydrated patient needs a 3.82% saline IV. Unfortunately, the hospital only has bags of 4% and 3% saline solutions. How many liters of each of these solutions should be mixed together to yield 5 liters of the desired concentration? So far I've come up

    asked by JerryJ
  211. engish (beowulf)

    how does the battle between Beowulf and the dragon show the inequalities of the Anglo saxon class system?

    asked by sue
  212. Chemistry

    Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.065 moles of sulfuric acid is mixed with water to make 456 mililiter of solution, what is the molarity of H+? Answer in units of M.

    asked by May (PLEASE HELP)
  213. Chemistry

    How many grams of sucrose (C12H22O11) must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose is 0.2? Answer in units of g.

    asked by May (PLEASE HELP)
  214. Physics

    A diagram represents a simplified sketch of an electric DC motor.which contains a magnet, commutator, carbon brushes, coil and a pivot. when the electric motor is connected to a 12V DC supply, it draws a current of 1,2A. The motor is now used to lift an

    asked by READ ME PLEAZZ
  215. physics

    An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.6 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the

    asked by jessy (PLEASE ANSWER ASAP)
  216. English

    Thank you very much for your corrections. Here are a few more sentences on the same subject I'd like you to check. 1)The Industrial Revolution brought several changes to Britain. First of all, it caused an enormous increase in production and consequently

    asked by Franco
  217. physics

    A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 23 m/s at an angle of 69° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its

    asked by Sarah
  218. chemistry

    Calculate the molarity for 25mL of H2C2O4 in a titration with 12.46mL of KMnO4

    asked by brian
  219. science

    why can a scientist use boiling point or melting point to identify an unknow substance?

    asked by jabrea
  220. Physics

    During an experiment a learner connects these two bulbs X and Y in series to the same power supply. he observes that bulb X now glows. USE AN APPROPRIATE EQUATION OR RELATIONSHIP TO EXPLAIN WHY BULB X NOW GLOWS BRIGHTER THAN BULB Y.

    asked by Lilianna
  221. Physics

    A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to

    asked by annonomus
  222. college

    what is a good thesis about autumn leaves, so i can write my parpagraph

    asked by brittany
  223. Math

    A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour and sugar in each batch of cookie. what is the number of batches the baker could have made with his flour and sugar

    asked by Kristy
  224. Physics

    A certain parallel capacitor consist of two identical aluminium plates, each of area 2times 10^-4m^2. the plates are separated by a distance of 0,03mm, with air occupying the space between the plates. CALCULATE THE CAPACITANCE OF THE CAPACITOR. AND ALSO

    asked by Masixole4Lydia
  225. physics

    A car drives straight off the edge of a cliff that is 56 m high. The police at the scene of the accident note that the point of impact is 129 m from the base of the cliff. How fast was the car traveling when it went over the cliff?

    asked by emily
  226. physics

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs? V = m/s ??

    asked by angela
  227. Algebra (HELP)

    To buy both a new car and a new house, Tina sought two loans totalling $78,825. The simple interest rate on the first loan was 0.2%, while the simple interest rate on the second loan was 5.0%. At the end of the first year, Tina paid a combined interest

    asked by JerryJ
  228. Chemistry

    The electrolysis (decomposition) of water produces hydrogen gas at the rate of 30.0 mL/min. A) Write a balanced chemical equation for this reaction and include phase designations. 2H2O(aq)---> 4H2(g)O2(g) Is whatever I've done above correct? B) What volume

    asked by Anonymous
  229. physics

    Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two

    asked by lauren
  230. Physics

    Deaths associated with lightning in South Africa are about four times higher than the global average. A typical thundercloud maybe at a potential of 1,2 times 10^8V and the thunder strike may result in a charge transfer of 20C. CALCULATE THE CURRENT

    asked by Orlando
  231. Physics

    A golfer imparts a speed of 32.1 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in

    asked by Kelly
  232. environmental science

    A farmer planted a fiel od BT-123 corn and wants to estimate the yeild in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that a bushel contains about 90000

    asked by crowder
  233. Science

    If you thought you had discovered a new element, how could you get the scientific world to accept your discovery? What roadblocks might you face, working outside the science community? How could you avoid being labeled a "crackpot"?

    asked by Jackie
  234. Chemistry

    Name four factors that can affect the rate of a chemical reaction. How does the rate of a chemical reaction change in response to a change in each factor? My answer: Four factors that can affect the rate of a chemical reaction are concentration, surface

    asked by Anonymous
  235. math

    6d-3d+2d=35?

    asked by Anonymous
  236. Social Studies

    Name 3 things that the Maya developed.... 1-their own writing system 2-their own counting system (including zero) 3-built 100 stone cities Is #3 correct? I can't find anything else!

    asked by I'm horrible
  237. EDU

    How many children are educated in pk 12 public schools in the united states?

    asked by Anonymous
  238. ap chem

    A 1.42 g. sample of a pure compound, with formula M2SO4, was dissolved in water and treated with and excess of aqueous barium chloride, resulting in the precipitation of all the sulfate ions as barium sulfate. The precipitate was collected, dried, and

    asked by josh sears
  239. physics

    A 200g mass is connected by a string to a large mass which is accelerating to the right at 2m/s2. What angle, θ, does the string make from vertical? What would the angle be if the acceleration to the right was 9.8m/s2? [Hint: Focus just on the ball. And

    asked by JEnn
  240. Physics

    Michael Jordan, formerly of the Chicago Bulls basketball team, has some fanatic fans. They claim that he is able to jump and remain in the air for two full seconds from launch to landing. Evaluate this claim by calculating the maximum height that such a

    asked by Kelly
  241. spanish

    Isabel una chica norteamericana uses of the ver ser

    asked by jasmine
  242. economics

    What is the relationship between GDP and the business cycle? How can you use information about the business cycle when making a decision about a large purchase?

    asked by Anonymous
  243. Math

    Step 1 = 3 boxes Step 2 = 6 boxes Step 3 = 11 boxes Step 4 = 18 boxes How many boxes at step 50? Which one? 100, 102, 2500, 2502 How would I solve this?

    asked by Amy
  244. math HELP

    A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour and sugar in each batch of cookies. what is the number of batches the baker could have made with his flour and sugar? this is

    asked by Kristy
  245. PHYSICS ---HELP!

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by lauren
  246. Chemistry

    What is the fundamental premise of the collision theory? My answer: The fundamental premise of the collision theory is that in order for moving particles to react, they must first collide with a certain minimum amount of energy. Is my answer right?

    asked by Anonymous
  247. math

    10x+7+3x

    asked by addison
  248. Chemistry

    Describe two features of a catalyst: -used in the industrial manufacture of chemicals where the rate of production is important. -assists reactants in their collisions but remains unchanged at the end of the reaction. Is this what they mean by "Give two

    asked by Anonymous
  249. Physics

    A child slides down a hill on a toboggan with an acceleration of 1.5 m/s squared. If she starts at rest, how far has she traveled in 1.0 s, 2.0 s, and 3.0 s?

    asked by Yanelys
  250. Science

    The state of cellular equilibrium is best described as a dynamic condition, not static. What does this mean?

    asked by Lisa
  251. 6th grade - EARTH SCIENCE

    What are three interesting facts about the upper mantle of the earth? and 3 interesting facts about the lower mantle of the earth?

    asked by Jen
  252. math

    20u-6(u+5)

    asked by addison
  253. math

    p-5(2-3)+1

    asked by jaylen
  254. Chemistry

    A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 141 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 degrees Celsius. What is the enthalpy of this reaction? Assume that no heat

    asked by Karen
  255. algebra

    How do I solve problems similar to: 2/3X - 1/2Y = 3

    asked by Gina
  256. 8th grade

    Data plotted on a graph results in a line that slopes upward from left to right. This graph tells you that a)when one variable increases, the other variable decreases. or b) when one variable increases, the other variable increases?

    asked by Angelo
  257. Math

    Please help!!!! Solve each system graphically. Be sure to check your solution. If a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this. 6x - 2y = 2, 9x - 3y = 1 My answer:

    asked by Jordyn
  258. math

    -2(2m-1)+4m

    asked by addison
  259. Physics Help!!

    Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two

    asked by LIZ
  260. English

    1. What did Bora want to do? - She wanted to do volunteer work. 2. Where do her friends usually volunteer? - They usually volunteer at libraries or town halls. 3. Did Bora want to volunteer at a library or a town hall? - No, she didn't. 4. Who told Bora

    asked by rfvv
  261. math

    3x-5x=

    asked by shantel brown
  262. English

    1. He wants to do two kinds of volunteer work this month. 2. He wants to do two volunteer works. (Are they correct?)

    asked by rfvv
  263. Com/155

    This week, you were asked to review the Topic Sentence section in the Center for Writing Excellence. Using the topic of home ownership versus leasing, identify a topic and provide a topic sentence you would use in a paragraph about the topic.

    asked by Anonymous
  264. math

    b-9b??? how are you supposed to simplify if there isnt a nmber before the b????

    asked by addison
  265. Physics

    On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.02 m/s2. (a) What is the net force exerted by the car on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting

    asked by tls
  266. edu310

    what role do colleges and universities play in preparing future educators to be successful in the classroom

    asked by Anonymous
  267. Math

    If I had to find the area of a circle (3.14)r^(2) - and it states that it is 5 meters in diameter would I divide 5 by 2 = 2.5 and then multiply 2.5 by 2.5 to get 6.25?

    asked by Amy
  268. algebra 2

    find the gcf and lcm of 315 and 882.

    asked by mary
  269. physics

    A spacecraft is traveling with a velocity of v0x = 6370 m/s along the +x direction. Two engines are turned on for a time of 843 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.20 m/s2, while the other gives it an

    asked by Isabella
  270. chemistry

    A solution contains an unknown amount of dissolved magnesium (Mg 2+). Addition of 5.50×10^−2 mol of Na2CO3 causes complete precipitation of all of the magnesium. what mass of the magnesium was dissolved in the solution? answer in unit g.

    asked by amanda
  271. algebra 2

    find the gcf and lcm of 315 and 882.

    asked by mary
  272. Where is DrBob222?

    Hey does anyone know when DrBob222 comes on here, cause I have a lot of chemistry questions which I need him to check. Thanks.

    asked by Anonymous
  273. Chem

    Calculate the work done when 40.0 g of tin dissolves in excess acid at 1.00 atm and 29°C. Assume ideal gas behavior. Sn(s) + 2 H+(aq) → Sn2+(aq) + H2(g)

    asked by Justyna
  274. English

    What are some frequently misused adjectives?

    asked by Trisha
  275. Math

    -4=x/7+3 i need to find the answer for "x"

    asked by Becca
  276. English 2

    Which hero's story, King Arthur's or Sundiata's, has the more relevant message for young people today? Compose an essay that answers this question, giving at least two examples from the selections and applying them to issues young people face today. Need

    asked by mysterychicken
  277. 6th grade math

    Add one set of parentheses to the expression - 7 * x + 3 + 8 * x + 3 * x + 8 - 9 so that it is equivalent to 2(9x + 10)

    asked by Josh
  278. Ecology

    I have to determine what color topsoil is most fertile. I'm not sure if it would be dark brown (because it reflects a lot of broken down organic material) or red (because it's clay, and clay is good for agriculture). What do you think?

    asked by Nathania
  279. Math

    What are the vertical and horizontal stretch/compressions for the functions h(x)=1/(5x) and k(x)=|0.4x| ?

    asked by Emily
  280. English

    I needed to create sentence containing the phrase "green with envy". I have got two sentences here, but I need help picking out the one that makes more sense. Emily’s new look made her friends green with envy. Emily’s friends became green with envy

    asked by Lisa
  281. science

    an airplane normally flies at 200 km/h, what is the resultant velocity of the plane if it experiences a 50 km/h tail wind, and a 50km/h head wind

    asked by jemimah
  282. ap chemistry

    A titration. 12.46 mL of KMnO4 are titrated with 25 mL of H2C2O4. The half reaction is 2H2O+H2C2O4 ARROW 2H2CO3+2H+2e-. How do I get the molarity of H2C2O4? PLEASE HELP

    asked by brian
  283. English

    What would be good sentence for emerald?

    asked by Lisa
  284. accounting

    Assume Venture Healthcare sold bonds that have a ten-year maturity, a 12 percent coupon rate with annual payments, and a $1,000 par value. a. Suppose that two years after the bonds were issued, the required interest rate fell to 7 percent. What would be

    asked by ted
  285. college math

    Please help me solve this Find the value of k so that the polynomial Q(x)= x^3 - k^2x^2 + k(5x-9)- 12 has a remainder of 1 when divided by x + 2

    asked by Jen
  286. 9th grade Deductive Reasoning Math

    Given: Angle A and Angle C are complementary to Angle B. Conclusion: Angle is congruent to Angle C. Determine whether each conclusion is valid based on the true conditional given. If not, write invalid. Explain your reasoning.

    asked by Ron
  287. Chemistry

    The buoyant force on a balloon is equal to the mass of air it displaces. The gravitational force on the balloon is equal to the sum of the masses of the balloon, the gas it contains, and the balloonist. If the balloon and balloonist together weight 175 kg,

    asked by Emma
  288. math

    -3(x=8)

    asked by ruben
  289. math

    Please help me answer this.. Suppose that 2^(x/2)= p 3^(x/3-1)= q [5^(x/2)]/3 = r Express (0.48)^x in terms of p, q and/ or r. this question came from our reviewer.. please and thank you!

    asked by Jen
  290. algebra

    How to factor 15x2+4x-3

    asked by Kyle
  291. Math 11th grade

    How to solve system of equations 5a=5 6b-3c=15 2a+7c=-5

    asked by Shana
  292. chemistry

    why is it important to record detailed observations, not just conclusions?

    asked by will
  293. Chemistry (General)

    When 280. mL of 1.50 x 10-4 M hydrochloric acid is added to 135 mL of 1.75 x 10-4 M Mg(OH)2, the resulting solution will be: acidic. basic neutral. It is impossible to tell from the information given.

    asked by Larry
  294. religion

    Why was religion a conflict between Israel and Palestine?

    asked by Bailey
  295. ap chemistry

    A titration. 12.46 mL of KMnO4 are titrated with 25 mL of H2C2O4. The half reaction is 2H2O+H2C2O4 ARROW 2H2CO3+2H+2e-. How do I get the molarity of H2C2O4? PLEASE HELP

    asked by brian
  296. Math

    7 students enter a school talent show. Prizes are awarded for the top 3 places. How many different top=three outcomes are possible? How would I solve this?

    asked by Amy
  297. biology

    what is the solvent for blood

    asked by shakeria
  298. physics

    A object is throw up with a speed of 25m/s. suppose that the gravity is 10m/s^2. Define the position and the velocity of the particle for the following times: 1second, 4second and 10second

    asked by peter
  299. Chemistry

    Is DrBob222 available tonight? Please let me know, I need some chem help.

    asked by Karen
  300. Ecology

    I also have to determine the deepest layer of mature soil--would it be the A Horizon, since it is decomposed organic matter? E Horizon is leaching, and anything downward is rock decomposing, so I think it has to be the A Horizon but I wanted to check.

    asked by Nathania
  301. Actuarial Math

    The sum of the accumulated value of 1 at the end of four years at a certain effective rate of interest, and the present value of 1 to be paid at the end of four years at an effective rate of discount numerically equal to I is 2.0098 Find the rate

    asked by Summer
  302. Physics

    A horse canters away from its trainer in a straight line, moving 120 m away in 11.0 s. It then turns abruptly and gallops halfway back in 4.9 s.

    asked by Lisa
  303. Actuarial Math

    Fund A accumulate at 8% effective and fund B accumulates at 10% effective. at the end of 20 years, the total of the two funds is $3000. at the end of 10 years the amount in fund A is half the in Fund B. what is the total of the two funds at the end of 5

    asked by Summer
  304. Economics

    who knows how to measure the true cost of a pint of B-Positive blood? A.None of these B.Any competent medical authority C.Only the Surgeon General of the United States D.An economist E.A clerk at the blood bank

    asked by Hayli
  305. Statistics

    Hi, My professor gave us the formulas for sample variance and population variance, as well as the shortcut formulas for each. However, he said that on some of the problems, we will HAVE to use the long formula, which for population variance would be:

    asked by Lila
  306. physics

    A golfer imparts a speed of 32.1 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in

    asked by Alex
  307. calculus 1

    Find d/dx for (sin πx + cos πy)4 = 65

    asked by Vy Nguyen
  308. Chmistry

    A sample of copper with a mass of 63.5g contains 6.02x10^23atoms.Calculate the mass of a single copper atom.

    asked by Janie
  309. Math

    Write a two column proof. -If XZ=ZY,XZ=4x+1,and ZY=6x-13, then x=7. Statements: Reason: 1.XZ=ZY,XZ=4x+1 and ZY=6x-13 1.Given That as far as I got to ^. Thanks

    asked by Shadow
  310. algebra

    25 miles / hour = x meters / minute

    asked by Allen
  311. calculus

    Please help, thank you!!! Find the derivative of the function. g(θ) = (cos(8θ))9

    asked by Vy Nguyen
  312. chemistry

    If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?

    asked by kayleigh
  313. Chemistry

    20.5 mL of oxalic acid,H2C2O4 were titrated with 0.800 M solution of lithium hydroxide. It took 40.0 mL of the base to reach the equivalence point. What is the molarity of the oxalic acid?

    asked by Ari
  314. physics

    There is a heat flow through a block of cross sectional area 21.5 cm2 and length 39 cm when the temperature difference of 18 degree Celsius is established across the block. Find the rate of heat flow through the block, assuming it is made of aluminium with

    asked by Anonymous
  315. Intro to Economics

    Past expenses are irrelevant to decisions to supply now, because A.people forget the past quickly B.it is esssential to avoid bankruptcy C.supply decisions depend on opportunities thst will have to be forgone, not opportunities already forgone D.expenses

    asked by Brittany
  316. math

    if a child and adult paid $23 for 2 tickets and an adult ticket is $6.50 more than the childs ticket, how do i get the answer?

    asked by Anonymous
  317. mgt 307

    Members of __________ must have good long-term working relationships with one another, solid operating systems, and the external support needed to achieve effectiveness over a sustained period of time.

    asked by sara
  318. physics

    Tarzan, who weighs 780 N, swings from a cliff at the end of a 12.0 m vine that hangs from a high tree limb and initially makes an angle of 49.0° with the vertical. Assume that an x axis extends horizontally away from the cliff edge and a y axis extends

    asked by student
  319. ap chem

    Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen and methane: 2NH3(g) + 3O2(g) + 2CH4 -->2HCN + 6H2O(g) a)If 5.00 x 10^3 kg each of NH3 , O2, and CH4 are reacted what mass of HCN will be produced, assuming 100% yield?

    asked by Emma
  320. physics

    A spring is launched at and angle of 30 degrees and pulled 30 cm back.The distance from the floor to the top of the launcher is 35 cm. At what distance will the spring lan in the bucket?

    asked by Live
  321. Chemistry

    Calculate the work done when 40.0 g of tin dissolves in excess acid at 1.00 atm and 29°C. Assume ideal gas behavior. Sn(s) + 2 H+(aq) → Sn2+(aq) + H2(g)

    asked by Justyna
  322. chemistry

    DNA is approximately 2.5 nm in length. If an average man is 6 feet tall, how many DNA molecules could be stacked end to end in an average man?

    asked by porsh
  323. chemistry

    A liquid has a volume of 3.70 liters. What is its volume in mL? In cm cubed?

    asked by porsh
  324. chemistry

    A solution contains 0.245 of dissolved lead (lead ion or Pb2+.) How many moles of sodium chloride must be added to the solution to completely precipitate all of the dissolved lead? What mass of sodium chloride must be added?

    asked by amy
  325. physics

    A object is throw up with a speed of 25m/s. suppose that the gravity is 10m/s^2. Define the position and the velocity of the particle for the following times: 1second, 4second and 10second

    asked by luis
  326. physics

    A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high. (a) How much later does it reach the bottom of the cliff? (b) What is its speed just before hitting? (c) What total distance did it travel? For (c), the

    asked by hana
  327. English

    1. They are eating cotton candy. 2. They are eating cotton candies. 3. They are eating a cotton candy. 4. The boy is eating two cotton candies. (Which one is correct?)

    asked by rfvv
  328. chemistry

    How do you calculate Ke for 2 SO2 (g) + O2 (g) ↔ 2 SO3 (g) + heat [0.0500] [0.0500] [0.103]

    asked by Kalia
  329. INTRO TO ECO

    Opportunity-cost theory suggests that the cost to an airline of letting its employees fly at no charge... A.is greater around the Christmas holidays B.will depend upon the value employees place upon travel C.zero D.depends upon alternatives avaliable to

    asked by Brittany
  330. math

    AMy's kite flew the highest. Benny's kite flew 50ft lower then amy's but 100 feet higher then cathy's. Cathy's kite was 100 feet higher then Devons. Devons' kite was 300 feet above the ground. How high was Amy's kite?

    asked by Pat
  331. Science

    A 65 kg woman dives from a 10 m platform. What is her speed as she enters the water.

    asked by Sam
  332. Math

    margarit liked to balance things. she balanced 3 pencil sharpeners and 2 one gram blocks with a 100 gram weight and another one gram block. she let x stand for the weight of one pencil sharpener and she claimed that x=30grams. was she correct if not how

    asked by Laura
  333. economics

    if land suitable for growing corn is also suitable for growing soybeans, the discovery that soybean oil prevents cancer will A.have no effect on the cost of growing corn B.reduce the cost of growing corn C.raise the cost of growing corn D.decrease the

    asked by Carrie
  334. History

    What are 3 factors that made Congress pass the Immigration Act of 1924? - racism can't think of the other two.

    asked by Amy~
  335. 8th grade math

    is n^2-3 a monomial

    asked by Johnston
  336. 8th grade

    What does "Le gusta aprender el espanol a ella?" Mean?

    asked by Anonymous
  337. English

    1. I usually go fising on weekend. 2. I usually go fising on weekends. (Are both right? 'On weekends' mean 'every weekend', I know. What is the difference between #1 and #2?)

    asked by rfvv
  338. math

    show 14 broken key is 1 show 2 ways

    asked by demarco
  339. Intro to ECONOMICS

    the basic reason suburban stores are more likely than downtown stores to provide free parking for their customers is that.. the cost of using land is higher in the downtown area?

    asked by Brittany
  340. English

    1. Dr. White helped many people. (In this sentence, is "Dr. White" a doctor?)

    asked by rfvv
  341. English

    1. The volunteers there deliver food to old people. (What is the part of speech of 'there'? Does 'there' modify 'volunteers? Then it is an adjective? Or is 'there' an adverb?)

    asked by rfvv
  342. 5th grade math

    How can knowing the multiplication. Properties help you evaluate five times twenty times sixty three

    asked by kaytlyn
  343. 8th grade

    is 53 a monomial

    asked by Johnston
  344. Physics

    A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to

    asked by christine
  345. 6th grade

    What physical property could you use to separate sand and sugar? How would you do it?

    asked by Wyeth
  346. physics

    A object is throw up with a speed of 25m/s. suppose that the gravity is 10m/s^2. Define the position and the velocity of the particle for the following times: 1second, 4second and 10second

    asked by luis
  347. Math

    Ineed to find out, one fourth of y. I think is 1/4 not sure! Thanks

    asked by Nathaniel
  348. statistics

    a math test has a mean of 43 and a standard deviation of 17.0. find the corrresponding z scores for a test score of 13 and a test score of 59. show work

    asked by Anonymous
  349. Science

    Use the law of conservation of mass to explain why a rusty nail weighs more than the original nail.

    asked by Wyeth
  350. math

    derek planted a garden in the shape of a square 32 feet on each side. The garden has a stream on one side, but he plans so build a fence on the other three sides. If he puts a post every 8 feet, how many posts will he need?

    asked by Pat
  351. statistics

    a math test has a mean of 43 and a standard deviation of 17.0. find the corresponding z scores for a test score of 13 and a test score of 59. show all work.

    asked by mary
  352. Physics

    A person walks 2.8597x10^1 m East, then turns around and walks 8.7898x10^1 m West. The total time to walk this distance was 4.4004x10^2 s. What is the velocity of the walker, expressed to 3 significant figures? Note: Your answer is assumed to be reduced to

    asked by christine
  353. science

    What physical property could you use to separate sand and sugar? How would you do it?

    asked by Wyeth
  354. Algebra

    Homework help please: algebra inequality 0.3 - 0.5n + 1 is greater than or equal to 0.4

    asked by Lisa
  355. intro to economics

    a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than

    asked by Brittany
  356. Math

    do you mean 1/4 x y or 1/4 divided by y?

    asked by Nathaniel
  357. Math-Calculus

    If f(x)=5ex+4xe find f'(x) .

    asked by Melissa
  358. math

    Why is 24,005 greater than 8,999?

    asked by Jessica
  359. double negatives

    the great white shark doesnt usually attack no person unless it confuses the person for a sea lion or seal

    asked by Anonymous
  360. Algebra

    -4 - 2n + 4n > 7 - 4

    asked by Lisa
  361. Chemistry

    Hi, I have to take chemistry placement test for college this week. Does anyone here have advice for studying to prepare for the test? I took chemistry in high school 2 years ago so I don't remember anything.

    asked by Advice please
  362. physics

    A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high. (a) How much later does it reach the bottom of the cliff? (b) What is its speed just before hitting? (c) What total distance did it travel? For (c), the

    asked by hana
  363. Physics

    The space shuttle releases a satellite into a circular orbit 440 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by Tatiana
  364. math

    Extend the pattern to complete the table Input 1234567 output 1 8 27 ? ? ? ?

    asked by shane
  365. math

    name the property illustrated by this equation, and describe the meaning of the property x times 5 =5x

    asked by gen
  366. chemistry

    Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate

    asked by ej
  367. The Nineteenth Century

    Which one of the following musical notations allows performers to improvise slightly with the rhythm? A. Sostenuto B. Moderato C. Allegretto D. Rubato

    asked by LVal
  368. math

    Which figure in the pattern below will have 99 squares? Figure 1 (picture of 1 square) Figure 2 (picture of 3 squares) Figure 3 (picture of 5 squares)

    asked by Shane
  369. Geometry

    the measure of the supplement of an angle is 40 more than two times the measure of the complement of the angle find the measure of the angle

    asked by Megan
  370. physics

    A student librarian picks up a 2.2 kg book from the floor to a height of 1.10 m. He carries the book 7.8 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?

    asked by Taylor
  371. Analytical Chemistry

    I am trying to find moles of IO3 from Cu(IO3)2 10 ml and standardized sodium thiosulfate (Na2S2O3.5H20) .28 M. My calc is: 0.28 Moles Na2S2O3.5H20 * (2 moles of S2O3/1 mole Na2S2O3.5H20)* (2 moles of (IO3)/1 mole Cu(IO3)2= (1.12/.01 L) but that is why to

    asked by Max
  372. math

    use words to describe the rule of the following sequence.Then find the next three ters of the sequence.2,3,and6 to illustratethe associative property of multiplication

    asked by gen
  373. Algebra 1

    The difference between the length and width of a triangle is 7 units. The perimeter is 50 units. What are the dimensions?

    asked by Billie
  374. Math

    Margarit liked to balance things. She balanced 3 pencil sharpeners and 2 one gram blocks witha 100 gram weight and another one gram block. She let x stand for the weight of one pencil sharpener and she claimed that x=30 grams. Was she correct? If not, how

    asked by Colton
  375. chemistry prt 2

    What is the net ionic equation of the reaction of MgCl2 with NaOH

    asked by ej
  376. chemistry prt 3

    What is the net ionic equation of the reaction of MgSO4 with NaOH

    asked by ej
  377. Math

    In Mathematics: how much interest will you have to pay for a credit card balance of $554 that is one month overdue if a 20% annual rate is charged?

    asked by Jenny
  378. math anaylsis

    what is x^2+54+800 in vertex form?

    asked by Anonymous
  379. statistics

    You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a population standard deviation 1 and a sample size of 4. Machine 2 has a sample mean of 8 and a population standard deviation of 2 with a

    asked by Anonymous
  380. Algebra

    please show steps solve 9 - (9)squared > 10x - x

    asked by Lisa
  381. physical science

    and elevator lifts five passengers 30 m in 24 sec. the power is 15000 w. what is the total weight of the elevator and passengers? ha know that?

    asked by Hailey
  382. Chemistry

    How can i explain the key features of the periodic table relate to the conclusions after a titration experiment

    asked by Paul
  383. math

    the deck in hope's backyard is round. It has 5 posts evenly spaced around the edges to support a trellis. For her birthday party, shewants to connect each post to all the other posts with crepe-paper streamers.How many streamers will she need?

    asked by Pat
  384. spanish

    what form do u use in vivir ex. mi familia (vivir) cerca del parque

    asked by sabih
  385. Algebra

    x^2+6x-44/x+9 X squared plus six X minus 44 divided by X+9. Having a hard time with this problem. I need someone to help me step by step or give me some pointers please? Thank you.

    asked by Daniel
  386. Chem

    I have no idea What to do. What does it mean by 'draw what you think the visible range spectrum of this dye would look like.' To get the A, I used Beer's law. So I got 9.265nm for Absorbance. What should I do for the next? The question is ----Next Simon

    asked by Kim
  387. chemistry

    what is the mass in kilograms of 750 mL of a substance that has a density of 0.930 g/mL?

    asked by porsh
  388. ECONOMICS HELP

    a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than

    asked by Brittany
  389. spanish

    cuando (regresar) a mi casa mi familia y yo (desayunar). luego voy a la escuela what it be translated in to the form by the subjects

    asked by sam
  390. spanish 1

    durante el dia (pasar) tiempo con mis amigos, what would be the form for the subject

    asked by samuel
  391. chem

    Which has highest boiling point? H20, H2S, H2Se, H2Te i know its H20, but why? is it because its dipole dipole? does it have to do with electronegative, or polarity?

    asked by brad
  392. Music

    Jody says that atonal harmony establishes a harmonic center of gravity. Sean says that atonal harmony doesn't have a harmonic center of gravity. Who is correct? A. Only Jody is correct B. Only Sean is correct C. Both Jody and Sean are correct D. Neither

    asked by LVal
  393. chemistry

    if 30ml of .150 M CaCl2 is added to 22.5ml of .1 M AgNO3, what is the mass of the AgCl precipitate?

    asked by jenna
  394. physics

    A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high. (a) How much later does it reach the bottom of the cliff? (b) What is its speed just before hitting? (c) What total distance did it travel? For (c), the

    asked by hana
  395. math

    derek planted a garden in the shape of a square 32 feet on each side. The garden has a stream on one side, but he plans so build a fence on the other three sides. If he puts a post every 8 feet, how many posts will he need?

    asked by Pat
  396. Intro to Eco Help

    supply curves slop upward to the right because.. higher prices attract resources from other uses?

    asked by Brittany
  397. statistics

    I.use the chebyshev's theorem to find out what percentage of the values will fall between 201 and 257 for a data set with a mean of 229 and standard deviation of 14. II. use the emperical rule to find out two values 68% of the data will fall between for a

    asked by mary
  398. statistics

    rank the following data in increasing order and find the position and value of the 94,51st percentile. show all work. 4,5,4,9,9,1,0,7,4,8,0,9

    asked by mary
  399. statistics

    the following data lists the average monthly snowfall for jan 15 cities around us: 34 9 28 24 0 46 34 20 1 38 5 16 32 26 25 find the mean, variance, and standard deviation

    asked by mary
  400. spanish1

    por la noche yo (escuchar) musica o (bailar) en mi cuarto. Mis padres (leer) revistas o (ver) la tele, y mi hermano (montar) en monopatin con sus amigos

    asked by spanishgeek
  401. spanish1

    por la noche yo (escuchar) musica o (bailar) en mi cuarto. Mis padres (leer) revistas o (ver) la tele, y mi hermano (montar) en monopatin con sus amigos pls help the right form for the subject

    asked by spanishgeek
  402. statistics

    starting with the values 70 and 100, add 3 data values to the sample so that the mean is 76. the median is 82 and the mode is 82. show work

    asked by mary
  403. science

    what is the power of a machine that does 1800 N-m of work per minute?

    asked by grayson
  404. math

    IAm greater then 4tens and less than tens i have 9 ones what number am i?

    asked by rita
  405. spanish

    por la noche yo (escuchar) musica o (bailar) en mi cuarto. Mis padres (leer) revistas o (ver) la tele, y mi hermano (montar) en monopatin con sus amigos pls help me in correct form to change wod in parenthesis

    asked by matty
  406. Marketing

    what is product development and what is product pentration

    asked by Anonymous
  407. statistics

    rank the following in increasing order and find the position and value of the 91st percentile show all work. 4,,5,4,9,9,1,0,7,4,8,0,9

    asked by mary
  408. Chemistry

    How can i explain the key features of the periodic table relate to the conclusions after a titration experiment The experiment was the preperation of a standard solution of sodium carbonate and titration for the equation between hydrchloric acid and sodium

    asked by Paul
  409. math 157

    Give the equation of the line that is perpendicular to the line y = x + 4 and passes through point (0, -1)

    asked by len
  410. college, statistics

    a math test has a mean of 43 and a standard deviation 0f 17.0. find the corresponding z scores for. show all work. I. a test score of 13 II. a test score of 59

    asked by mary