Questions Asked on
March 15, 2010

  1. chemistry

    Why are coefficients used in mole ratios instead of subscripts

    asked by Kayla
  2. Physics

    A light beam strikes a piece of glass at a 60.00° incident angle. The beam contains two wavelengths, 450.0 nm and 700.1 nm, for which the index of refraction of the glass is 1.4824 and 1.4750, respectively. What is the angle between the two refracted

    asked by John
  3. chemistry

    how to write the oxidation number for CL4

    asked by Sienna
  4. Grammar

    Two households, both alike in dignity. what is the prologue's first prepositional phrase?

    asked by Cesar
  5. Physics

    After a tornado, a 0.55g straw was found embedded 2.3cm into the trunk of a tree. if the average force excerted on the straw by the tree was 65N, what was the speed of the straw when it hit the tree?

    asked by Stevie
  6. Physics

    A small, nonconducting ball of mass m=1.0mg and charge q=2.0*10^-8 C (distributed uniformly through it's volume) hangs from an insulated thread that makes an angle theta = 30 degrees with the vertical, uniformly charged nonconducting sheet. considering the

    asked by Matt
  7. Biology

    'We are currently in an energy crisis. After food, fossil fuels are humanity's most important source of energy. These resources take millions of years to make. We are currently using the fuels that were made more than 300 million years ago, before the time

    asked by mysterychicken
  8. English lit

    I need to write a explication about this poem, can you help? A poem comes straight from inside the heart A poet with his own poem he will never part A poet feels and can see what others cannot see A poet can see beauty in bees and the fruitful pure tree A

    asked by Anonymous
  9. Physics

    An ice cube is placed in a microwave oven. Suppose the oven delivers 105 W, of power to the ice cube and that it takes 32,200 J to melt it. how long does it take for the ice cube to melt?

    asked by Rosco
  10. Chemistry

    how much CuSO4.5H2O is required to prepare 100 ml of a .050M aqueous stock solution?

    asked by jen
  11. chemistry

    How do I write the skeleton equation representing the heating o f magnesium carbonate to produce solid magnesium oxide and carbon dioxide gas?

    asked by Brittany
  12. Organic Chemistry

    why was it possible to separate the product from sodium hydroxide using acetone?

    asked by Jenny
  13. chemistry

    How do you balance this equation? Zn(s) + HNO3(aq)--> Zn(NO3)2(aq) + N2O(g) + H2O(l)

    asked by Ana
  14. Yoku

    A prism has total surface area of 360 m2 and volume of 60 m3. If the length, width, and height are reduced to half their original sizes, what will be the following?

    asked by Eric
  15. probability

    consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of the stated event. A card that is not a king and not a spade is drawn. I know there are 52 cards in a deck and there are 4 kings to a

    asked by alex
  16. Pysics

    A small motor runs a lift that raises aload of bricks weighing 836N to a height of 10.7m in 23.2s. assuming that the bricks are lifted with constant speed, what is the minimum power the motor must produce?

    asked by Cody
  17. chemistry

    assuming x=1, how much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex?

    asked by jess
  18. Economics

    Bridget has a limited income and consumes only wine and cheese; her current consumption choice is four bottles of wine and 10 pounds of cheese. The price of wine is $10 per bottle, and the price of cheese is $4 per pound. The last bottle of wine added 50

    asked by John
  19. physics

    a atapult launcher on an aircraft carrier accelerates a jet from rest to 72m/s. The work done catapult during the launch is 7.6 x 10 to the 7th J. a)What is the mass of the jet? b) If the jet is in contact with the catapult for 2s, what is the power output

    asked by Clayton
  20. social studies

    Create a timeline tracking the major themes shifts in american history from the developement of sectionalism in the early 1900s. Im just asking for help and a site to help me come up with the information for my timeline. Please Help!!!!!

    asked by Dellaine
  21. Environmental Science

    Research Paper I need to write a research paper on coral reefs. i need to compose a research paper that deals with coral reefs and addresses enough of the questions below in order to meet the minimum page requirements for the paper (3-4 double spaced

    asked by y912f
  22. Environmental Science

    34. In two or three well-developed paragraphs, list four federal laws that relate to mining and reclaiming mined land, and state examples of provisions of each. Can I please get some help on this question? Thank you.

    asked by y912f
  23. College CHem

    Suppose you accidently add too much NaOH during a titration. You then add a volume of HCl exactly equal to ½ the volume of NaOH actually used in the titration. What effect does this have on the Ka?

    asked by Stephany Toussaint
  24. Physics

    Two current carrying wires cross at right angles as indicated in the figure. If the wires are not restrained, what statement best describes the motion of the wires? Hint: To help you visualize the situation, draw first the magnetic field that Wire 1 makes

    asked by mm.
  25. physics

    How much force does an 71 {\rm kg} astronaut exert on his chair while sitting at rest on the launch pad? Express your answer using two significant figures.

    asked by norm
  26. personal finance

    Todd is applying for a $100,000 mortgage.He can get a $600 monthly payment for principal and interest and no points,or $520 monthly payment with 2 points.How many months will it take Todd to cover the cost of discount points if he takes the lower monthly

    asked by vedrana
  27. Trigonometry

    a satellite camera takes a rectangular - shaped picture. the smallest region that can be photographed is a 4 - km by 6 - km rectangle. as the camera zooms out, the length l and width w of the rectangle increase at a rate of 3km/sec. how long does it take

    asked by Billy
  28. Chemistry

    Suppose that we had used 25.5cm3 of 0.200M NaOH and 42cm3 of dilute HCl to reach the end point. What is the molarity of the Hcl acid? HCl = NaOh--> NaCl + H20

    asked by Anonymous
  29. Chemistry

    Problem: In a first order decomposition reaction, 50% of a compound decomposes in 10.5 minutes. What is the rate constant of the reaction? The solution my professor gave says: k = .693 / 10.5min Where did the .693 come from? Thanks

    asked by Help
  30. Math

    A man earned $ 3000 the first year he worked. If he received a raise of $ 400 at the end of each year, what was his salary during the 15 th year? A) $ 8600 B) None of these C) $ 5600 D) $ 9000

    asked by Lisa
  31. physics

    (a)At a certain instant, a particle-like object is acted on by a force F = (4.0 N)i - (2.0 N)j + (9.0 N)k while the object's velocity is v = - (2.0 m/s)i + (4.0 m/s)k . What is the instantaneous rate at which the force does work on the object? (b)At some

    asked by sel
  32. chemistry

    What is the boiling point of the water in your radiator if 2.00kg of antifreeze (ethylene glycol, C2H6O2) is added to 9.00x10^3 grams of water?

    asked by Katelynn
  33. Business Law

    What does is mean that "emissions trading has propertitized pollution"?

    asked by Anonymous
  34. physics

    What is the kinetic energy of a 62kg cyclist if she is moving on her bicycle at 8.2 m/s?

    asked by trisha
  35. math

    If y varies inversely as x,find the inverse variation equation for the situation y=65 when x=9

    asked by Kari
  36. math

    Write the following statement in if - then form. David will sing provided Eric plays the piano. i don't get get this

    asked by amy
  37. Physics

    A beam of light is emitted in a pool of water from a depth of 61.5 cm. How far away, relative to the spot directly above it, must it strike the air-water interface in order that the light does not exit the water?

    asked by Anonymous
  38. math

    Harry borrowed $1,800 for two years at 13% a year under an add-on plan. He repaid the loan, including interest, in 24 equal payments. How much was each payment?

    asked by puppy101``
  39. chemistry

    What is the boiling point of the water in your radiator if 2.00kg of antifreeze (ethylene glycol, C2H6O2) is added to 9.00x10^3 grams of water?

    asked by Katelynn
  40. chemistry

    What is the boiling point of the water in your radiator if 2.00kg of antifreeze (ethylene glycol, C2H6O2) is added to 9.00x10^3 grams of water?

    asked by Katelynn
  41. health

    The joined cells, now called a blastocyst, move toward and attach to the mother's uterine lining. How long does this take?

    asked by amy
  42. marketing

    Alex is developing the marketing strategy for a brand of men's clothing. Before he develops his strategy, Alex will conduct research to better understand his customers. Briefly describe a conceptual model that includes the factors he should consider in his

    asked by Anonymous
  43. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton d. hydrostatic skeleton,

    asked by mysterychicken
  44. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton d. hydrostatic skeleton,

    asked by mysterychicken
  45. algebra 2

    A bag contains 4 white marbles, 3 red marbles, 2 green marbles, and 1 yellow marble. what is the probability of reaching in the bag and randomly choosing a white marble?

    asked by zac
  46. ethics

    o According to research and news reports within the past 2 years, what are some of the changes the United States has made to policies concerning the treatment of Muslim and Arabic members of society? CAN SOMEONE POINT ME IN THE RIGHT DIRECTION TO START MY

    asked by chadisia
  47. physics

    Posted by norm on Monday, March 15, 2010 at 9:21am. What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.30 and 0.20, respectively.

    asked by norm
  48. Biology

    20. Three common characteristics of adult vertebrates are a. skull, notochord, and complex organ system b. backbone, segmentation, and open circulatory system c. two pairs of jointed appendages, cephalization, and internal skeleton d. hydrostatic skeleton,

    asked by mysterychicken
  49. physics

    What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.30 and 0.20, respectively.

    asked by norm
  50. PRE CAL. JOURNAL

    A BAG CONTAINS 3 RED CHIPS, 2 BLUE CHIPS AND 1 WHITE CHIP. IF 2 CHIPS ARE CHOSEN FROM THE BAG WITHOUT REPLACEMENT DETERMINE THE PROBABILITY THAT THEY ARE OF DIFFERENT COLORS

    asked by RAMATU
  51. Exploring Space

    rocket engines which work in space still need oxygen 4 the fuel to bur. space is a vacuum. where does the oxygen come from? I'm stumped on this, can someone please lend me help, thanks

    asked by Sara
  52. math

    It takes Tammy 45 minutes to ride her bike 5 miles. At this rate, how long will it take her to ride 8 miles?

    asked by emma
  53. Physics

    An electron and a proton execute uniform circular motion in the presence of a uniform magnetic field. If the radius of the circle is the same for both particles, which of the following statements is true? a. Both particles move in the same direction; the

    asked by mm.
  54. Geometry

    I'm not asking for the answer (I hate when people do that) I'd just like to know how to go about this so that I may understand. Any help is much appreciated. "A sphere of ice cream is placed onto your ice cream cone. Both have a diameter of __ cm. The

    asked by Kayte
  55. Chemistry

    Each Rolaid tablet contains 550mg of calcium carbonate and 110mg of magnesium hydroxide. Kroger Extra Strength antacid tablets contain 750mg of calcium carbonate per tablet. What is the neutralizing ability per gram for each tablet? Your answer should be

    asked by Anonymous
  56. Chemistry

    We conducted a lab with antacids in class the other day and i'm having trouble doing the calculations. Well we basically took antacid tablets dissolved them in HCl, heated it and then added phenolthalien and then titrated until we saw a pink color. At 41mL

    asked by Anonymous
  57. chemistry

    Given 1.115 atm of carbon monoxide reactimg with 1.553 atm of oxygen in a closed container at a constant temperatue, what is the theoretic yield of the carbon dioxide?

    asked by Tom
  58. Physics

    Hi! Need help please, thank you. Question:In a model AC generator, a 498 turn rectangular coil 14.0 cm by 21 cm rotates at 124 rev/min in a uniform magnetic field of 0.65 T. (a) What is the maximum emf induced in the coil? ___ V (b) What is the

    asked by Chan
  59. 5th grade

    To cause a commotion that could ruin a plan: rock_ _ _ _ _ _ _

    asked by Alex
  60. Chemistry

    You have acid reflux and you take teaspoon of sodium bicarbonate. Assuming that one gram of sodium bicarbonate made it down into your stomach, how many moles of acid could it neutralize?

    asked by Anonymous
  61. conics

    The graph of y=x^2 is reflected in the x-axis, then stretched vertically by a factor of 2, and then translated 3 units to the left and 1 unit down. I need to write the equation of this parabola in standard and general form. I have 4 other questions so

    asked by Sandy
  62. Chemistry

    Write the balanced chemical equation for the equilibrium that is taking place between acetic acid and sodium acetate in the buffer solution.

    asked by Axl
  63. word problem

    A manufacturer of graphing calculators has determined that 11,000 calculators per week will be sold at a price of $90 each. At a price of $80, it is estimated that 17,000 calculators would be sold. A.) determine a linear function that will predict the

    asked by kiley
  64. Environmental Science

    Research Paper I need to write a research paper on coral reefs. i need to compose a research paper that deals with coral reefs and addresses enough of the questions below in order to meet the minimum page requirements for the paper (3-4 double spaced

    asked by y912f
  65. Pre-Cal(Please help)

    1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?

    asked by Hannah
  66. chemistry

    Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 -> 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the

    asked by Ben
  67. Statistics in Psychology

    A participant in a cognitive psychology study is given 50 words to remember and later asked to recall as many as he can of them. This participant recalls 17. What is the (a) variable, (b) possible values, and (c) score?

    asked by Jennifer
  68. Chem

    Suggest two experimental errors which would result in too low a value for the acid EW. Explain how these errors result in a low value.

    asked by Stephany Toussaint
  69. Math

    Make each sentence true... 48 divided by 6 plus 2 x4 =24 45= 54 -24/6 minus 5 0= 54 minus 24 times 6 -5

    asked by Missy
  70. APCHEm urgent!!!!!!

    Hi thank you so much!!!! What is a net ionic equation for the reaction of H+ with Cu(NH3)4 ^2+ ALSO what is the net ionic equation for the reaction of H+ with Hg2Cl2 Does the H+ addition increase, decrease, or has no impact on the solubility of the salt.?

    asked by Kiki
  71. physics

    1. If a steel rope and a nylon rope of equal lengths are to stretch by equal amounts when subjected to equal tensions, what must be the ratio of their distances? 2.A simple hand operated hydraulic press can generate a pressure of 6.0 X 10^9 N/m^2 . If the

    asked by Sandhya
  72. physics

    1.An elastic cord is 5.0m long and 1.0cm in diameter and acts as a spring with spring constant 70 N/m, what is the young's modulus for this material? 2.A heavy uniform beam of mass 8000 kg and length 2.0m is suspended at one end by a nylon rope of diameter

    asked by Sandhya
  73. algebra

    Television sets: What does it mean to refer to a 20-inch TV set or a 25-inch TV set. Such units refer to the diagonal of the screen. A 25-inch TV set also has a width of 20-inches. What is its height? Height of a 25-inch TV. _______inches

    asked by Terri
  74. Thermodynamics

    A rigid insulated closed tank consists of two compartments of equal volume separated by a valve. Initially one contains air at 145 psia and temperature of 130 F, while second is completely empty(vaccum). the valve is opened and remains so until both are in

    asked by spencer
  75. Exploring Space

    what wud hold the cable of a space elevator up? Would it be earth's gravity holding the cable of a space elevator up?

    asked by Sara
  76. College Math

    Find the exact value of: sin [2sin^-1 (-sq rt (3)/2)] how do i answer this question? i don't know how to find the answer.

    asked by Katie
  77. chemistry

    How many grams of CH4 are needed to react with 160.0 grams of Br2

    asked by Lauren
  78. Physics

    The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does not depend on ... The radius of the circle The mass of the particle The charge of the particle The magnitude of the magnetic field

    asked by mm.
  79. Biology

    What biological impacts are we seeing as a result of the use of fossil fuels? I still can't figure this out, even after googling it. What's the difference between a biological impact and an environmental impact? -MC

    asked by mysterychicken
  80. american history

    what countries fought with us in world war 1?

    asked by meeka
  81. personal finance

    Which of the following would increase the amount that a person could afford to spend on a home? a)increased family income b)increased interest rates c)decreased down payment d)high montly living expenses IS A CORRECT ANSWER?THANK YOU:))))

    asked by vedrana
  82. Chemistry

    Classify each reaction and balance the equations. Al(OH)3 ==> Al2O3 + H2O

    asked by Jack
  83. Chemistry

    How do you balance Al(OH)3 --> Al2O3 + H2O Why does the OH decompose into O3 and H2O??

    asked by Jack
  84. Math

    Give a verbal, visual, numerical, and graphic representation for the idea one and one-sixth.

    asked by Lisa
  85. Math

    2 buildings have 60 floors altogether. Building A has 3 floors for every 2 floors of building B. How many floors does each building have?

    asked by Summit Drive
  86. physics

    a force of 20N is exerted on a court for 10 seconds. How long must a 40N force act to produce the same impulse?

    asked by Jai
  87. math

    what is the inverse of (x-3)^2+2 ((x-3)squared plus 2))

    asked by nevaeh.
  88. math

    I am greater than 15 and less than 40. If you double me, I become a number that ends in 0. 1/5 of me is equal to 5

    asked by Anonymous
  89. Gen 200

    Prepare a 700 to 1,050-word paper in which you explain the relationship among professional values, ethics, and career success. Address the following items in your explanation: Define values and ethics. Identify at least three sources of professional values

    asked by Alida
  90. College Chemistry Lab

    The absorbance of a 9.25x10^-8M solution of a fabric dye was measured to be 0.835 at a particular wavelength. What would the absorbance be for a 4.65x10^-8M solution of the same dye under identical conditions?

    asked by L**
  91. physics

    Hi! could anyone help me with this question please, I really don't know how to do this at all. Thank you so much. Question:A 330 turn solenoid with a length of 21.0 cm and a radius of 1.40 cm carries a current of 2.10 A. A second coil of four turns is

    asked by Chan
  92. trig

    how do you find all the solutions when cos x = .75

    asked by hilde
  93. English

    How dow the characters in a traditional fairy-tale differ to those in the princess bride.

    asked by Tayler
  94. English

    Whats Wrong with my thesis on Great migration? The Great migration was the movement of African Americans traveling from the South to the north in search for jobs.

    asked by Jeremy
  95. college

    what values are excluded from the domain of the function f(x)= x-5/x?

    asked by kiley
  96. algebra

    Simplify the complex fraction m^-1+z^-1/m^-1-z^-1

    asked by Anonymous
  97. math

    A Boeing 747 jet takes off from Boston's Logan Airport, which is at sea level, and climbs to a cruising altitude of 27,000 ft at a constant rate of 1400ft/min. A.) write a linear equation for the height of the plane in terms of the time after takeoff. B.)

    asked by kiley
  98. Physics

    Gold ions (Au+) are accelerate to high speeds using electric fields. These ions are then passed through a region where uniform electric E and magnetic B fields are present. If the ions are traveling to the right, which configuration of E and B will serve

    asked by mm.
  99. math

    if a whole number less than 10 is choosen at random, what are the odds that the number is greater than 5?

    asked by tammy
  100. math

    Which value of 'x' is the solution of the equation 2x/3 + x/6 = 5?

    asked by emma
  101. Chemistry

    What is the structure of a tripeptide where glycine is first, serine is second, and alanine is third.

    asked by Holly
  102. Math-Rational #'s

    Just trying to understand this. Please let me know if I did these right. Thanks!!! -7 as a rational # = -7/10 -3.03 as a rational # = -33/10 -2 3/12 as a rational # = -25/12 1.03 as a rational # = 13/10

    asked by Kate
  103. u.s. civics

    A court of justice.

    asked by Carolyn
  104. math

    I fyou start with 2 and count by 4s until youreach the number 202, you will have the following number sequence. 2, 6, 10, 14...202 If 2 is the first number in the sequence, 6 is the second and so on, what number in the sequence is 202?

    asked by trinity
  105. Math :(

    I have a 7 sided shape that looks like an octagon, but it only has 7 sides. Is it a rhombus, a square, a parallelogram, a kite, a rectangle, a trapezoid, a chevron, or just a quadrilateral?

    asked by Sam
  106. Pre-Cal

    1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?

    asked by Hannah
  107. maths

    Solve the following simultaneous equation: 8x+3y=23 6x+5y=9

    asked by nabiha
  108. maths

    solve the following simultaneous linear equation: -5x+6y=44 9x+7y=-8

    asked by nabiha
  109. language arts

    Fill in the blank: The president will _______ well- deserved honors on the retiring ambassador.

    asked by Hannah
  110. French

    Can you please check these Choose A. Le caissier m'a donné 200 euros en liquide. B. Je suis toujours fauché. C. Le caissier m'a donné 10 billets de dix. D. J'aime mettre de l'argent de côté. 1. -------- J'ai touché un chèque de 200 euros. Answer: A

    asked by Vanessa
  111. Biology

    What are the pros and cons of alternative fuel sources? I googled this but still can't find anything...Please help -MC

    asked by mysterychicken
  112. chemistry

    The figure below represents the bulls eye target for an archer. The black dots represent where the archer’s arrows hit: How can this archer be described? a. accurate b. precise c. accurate and precise d. neither accurate nor precise

    asked by khin
  113. Chemistry

    Assuming that each system behaves ideally, which solution (.25m KCl or .25m C3H8O3) would have the lower freezing point? Explain.

    asked by Katelynn
  114. Math 30 transformations

    The question says Draw the reflection of f(x)=sqrt x-2 in the line y=x which I done but now I need to write the equation of the reflection in the form of y=g(x). I'm not sure how to write this equation using this form. Could you please help. Thanks

    asked by rae
  115. Math

    I have more i don't understand?? Use the distributive property of multiplication over addition to rewrite the sum as a product of two factors, where one of the factors is a sum. 14) 6yz - 54y A) 6y(z - 9) B) 6y(z - 54) C) 6y(z + 9) D) 9y(z - 6) explain

    asked by Lisa
  116. ECONOMICS

    WHAY IS GLOBAL ECONOMIC CRISIS?

    asked by SH
  117. trig

    find in degrees the value of Ө in the interval O¡ÜӨ¡Ü 360 for which 2cos^2Ө-cosӨ-1=sin^2Ө give your answers to 1 decimal place where appropriate

    asked by kuri
  118. math

    how do you make four 8s into 640??

    asked by tabitha
  119. trig

    how do you simplify "[sin(x)+tan(x)]/[1+sec(X)]"

    asked by Brad
  120. chemistry

    How many moles of O2 are needed to combine with 0.288 mol Al to give Al2O3?

    asked by .
  121. Math

    A delicatessen serves 13 kinds of sandwiches and 5 kinds of chips. How many different sandwich and chip lunches can they make if each lunch has one sandwich and one bag of chips? A) 13 B) 1 C) 65 D) 18

    asked by Lisa
  122. Hypothesis

    7) If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of a number is not divisible by 3. Therefore the number is not divisible by 3. A) affirming the hypothesis B) denying the conclusion C)

    asked by Lisa
  123. Math

    A shoe manufacturer determines that the annual cost of making x pairs of one type of shoe is $30 per pair plus $100,000 in fixed overhead costs. Each pair of shoes that is manufactured is sold wholesale for $50. a. Find the equations that model Revenue and

    asked by Rony
  124. english

    critical essay on phenomenal woman

    asked by Anonymous
  125. math

    Last week we needed 30 chairs for the meeting. This week we need 200% of what number. I think the answer is 1.2

    asked by pam
  126. finance

    Why should the notes that are incorporated into the Financial Statements data should provide anyone with enough information to accurately assess the impact of the change, either positive or negative?

    asked by Terri
  127. chemistry

    What mass iron(III) oxide could be produced from 8.2 mol of oxygen gas in the synthesis of iron(III)?(Balanced equation)

    asked by Ruby
  128. Algebra

    How can you find log base 3 of 242/5 using the given information without a calculator? log base 3 of 10 = 2.1 log base 3 of 11 = 2.2 log base 3 of 4 = 1.3

    asked by Sara
  129. math

    a worker in a city park needs to cover a circular path around the outside of a flower garden with gravel. the radius of the garden is 15 feet and the path surrounding the garden is 6 feet wide. how many square feet need to be covered with gravel? explain

    asked by Katherine
  130. Algebra 3

    (x-2)/(x+2)=(3)/(x)

    asked by Akeevia
  131. algebra 3

    find domain: f(x)=sqrt of 100-x^2 f(x)=sqrt of 2x^2+6x-8

    asked by jennifer
  132. Chemistry for Bob

    Do you mind posting up an example for that please? It would help out a out: What is the activation energy for a reaction whose rate tripled when temperature rose from 28 to 53C.

    asked by Jeena
  133. English

    I made a few more changes. Let's hope everything is fine this time. Thank you. 1) Mr Utterson decides to look for Mr.Hyde. At last, Mr. Hyde appears. Utterson hears his steps approaching the end of the street. 2) He is a small, plainly dressed man and his

    asked by Franco
  134. English

    When can you start a sentence with and or but? Can I get some examples? Thanks -MC

    asked by mysterychicken
  135. Exploring Space

    Why do astronauts appear to float when they aboard the ISS station and experience 90% of earth's gravitational pull? Is it because of the freefall?

    asked by Sara
  136. English

    Hey, i am not doing good in my English 102 class, my professor says i address my writing prompt in the wrong direction. So i was hoping if someone can help break down my writing prompt, and give me a direction to write my essay. Writing Prompt: The

    asked by Bakr
  137. chemistry

    the form of the conversion factor that is used is the one in which the unit of the_ is in the denominator

    asked by rabah
  138. Physics

    GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules

    asked by mm.
  139. spanish

    In Spain, all hotels are new and modern buildings? True or false.

    asked by Katie
  140. health

    How do culture and health beliefs affect the spread of emerging disease? Can someone help me with specific examples?

    asked by Princess
  141. Math

    how do i factor this? 2x^3+4x^2+2x

    asked by Jenevecia
  142. English

    1. Each one of us has his room. 2. Each of us has his room. 3. We each have our room. 4. We each have our rooms. (Are they all the same? Which one is correct #3 or #4?)

    asked by rfvv
  143. chemistry

    If 23.5 grams of iron chloride are produced how many grams of iron did you start with?

    asked by Son
  144. English

    1. Cut out all the pieces. (Does 'out' mean 'completely' here?) 2. Shine a light on the back of the stage. 3. Shine a light at the back of the stage. 4. Shine a light in back of the stage. 5. Shine a light in the back of the stage. (Which one is right? Do

    asked by rfvv
  145. math

    if the median to the hypotenuse of a right triangle measures 25 and a leg 14, find the measure of the other leg

    asked by chelsea
  146. english

    hello :) I wrote a story with preterit in that story the man talks of what happened 10 years before (It's a bet, he should be ruined finally when the other man finished his bet , he waives the money) what are the tenses which I have to use? so please help

    asked by MARIE
  147. Algebra

    The formula b=26a is used in New England to estimate the minimum furnace output, b, in BTU's, for a modern house with a square feet of flooring. What is the minimum furnace output? what is a? HOW DO I FIND THESE QUESTIONS OUT?

    asked by Anonymous
  148. Math

    Find the number of subsets of the given set. 4) {mom, dad, son, daughter} a. 16 b.14 c.12 d. 8

    asked by Lisa
  149. English

    1. He retired from baseball in 1999. 2. He retired from a baseball player in 1999. 3. He retired from his job in 1999. 4. He retired from throwing balls in 1999. (Are they alll grammatical?) 5. He was born in Flint, Michigan, America. 6. He was born in

    asked by rfvv
  150. Thermo

    one more question: a worker cleans a railroad car with steam of 15000ft^3 car on inside, t=240F P=14.7psia of steam. the car is closed. the steam inside cools until P=12 psia, at which time salad oil is added to tank. find a. heat transfer from steam

    asked by spencer
  151. health

    Why were human births historically so dangerous, particularly before C-sections were possible?

    asked by yelena
  152. critical thinking

    what are the fallacies in 5. Letter to the editor: “I strongly object to the proposed sale of alcoholic beverages at County Golf Course. The idea of allowing people to drink wherever and whenever they please is positively disgraceful and can only lead to

    asked by suzie
  153. 7th grade

    bycycle is to gear as car is to_______

    asked by hello 2010
  154. trig

    combine fractions and simplify to a multiple of a power of a basic trig. function.? sin x/cot²x - sin x/cos²x

    asked by hilde
  155. chem

    why does the temperature decrease as the internal energy of a system decrease?

    asked by kim p
  156. math

    ____% of 87.56 ounces is 22.6 ounces. i have to round to the nearest tenth of a percent. i think the answer is 64.96

    asked by pam
  157. Science

    1. Temperature cools about 6.5 degrees Celsius per kilometer of _______. 2. ___________ from 10 km to 50 km about Earth, this layer contains ozone that absorbs much of the Sun's ultraviolet radiation. It contains most clouds and ____________. 3. _______

    asked by Terri
  158. apCHEMistry

    "What is the range for the color change of phenolphthalein?" thnk you very much

    asked by Deeda
  159. Chemistry

    The standard electrode potentials for three electrode systems are: Ti^3+(aq) + e^- --> Ti^2+ E= -0.37 Fe^3+ ---> Fe^2+(aq) E= +0.77 Ce^4(aq) + e^- ---> Ce^3+(aq) E= +1.45 Using the data above, deduce which species is the best reducing agent, giving a

    asked by Kari
  160. College Chemistry Lab

    The absorbance of a 6.3x10^-5M solution of an iron complex was measured to be 0.328 at the optimum wavelength. A second solution of the iron complex has an absorbance of 0.833 measured under identical conditions. What is the molarity of the complex in the

    asked by L**
  161. Object Orientation

    Use your own words to describe or Explain the 4 basic principles of Object Orientation. ( Abstraction, Encapsulation, Modularity, and Hierarchy) Thanks for the help

    asked by Jordan
  162. chemistry

    What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?

    asked by Jeena
  163. Polish School

    hey I need help. Can you finish this sentance, using one of these words? Words powstanie niepodleg³oœci rosyjskim emigracji 1863 Sentance: W XIX wieku Polacy podejmowali próby odzyskania... Thanks!

    asked by Nikki
  164. English

    I found it difficult to rephrase a few sentences taken from Stevenson's D Jekyll and Mr Hyde. I included them into inverted commas. i really hope you can help me clarify their meanings. 1) Utterson decided to look for Mr.Hyde. As he was waiting for him at

    asked by Franco
  165. math

    a company's balance sheet shows tatal assets of $450,991, total current liabilities of $47,342, and total long -term liabilities of $150,509. its total stockholder equity must be

    asked by sue
  166. physics

    GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules

    asked by mm.
  167. college math

    find the range of the function defined by the equation and the given domain. f(x)=3/x-6; D={-3,0,3,9}

    asked by kiley
  168. time value of money

    The ABC Computer Corporation is considering an increase in its annual advertising expenditure from $10 million to $15 million for a five-year period(i-e. in years 1 to 5. The marketing department estimates that the increased advertising will increase

    asked by nabeela
  169. computer

    Most computer systems are set up to automatically first check which drive for the booting program

    asked by Hallie
  170. marketing

    21) ______________ 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. Diversification B. Market positioning C. Market segmentation D.

    asked by Christa Cullin
  171. math

    how many times would a bicycle wheel with a radius of 36cm rotate in 2km?

    asked by heather
  172. physical science

    in a transverse wave, the what is the lowest point?

    asked by marley
  173. English

    Thank you for your suggestion. I just wanted to be sure that I paraphrased the following 4 sentences correctly. I really hope you can have a look at them. 1) Mr Utterson heard his steps approaching (or getting closer?) as Mr Hyde was turning the end

    asked by Franco
  174. math

    a triangle b means (10*a) + b. for an example,5 triangles 4= (10*5)=50+4 =54.find the value of8 triangle 1.

    asked by Daeun
  175. Chemistry

    How many moles of bromine are obtained from 6.75 moles of oxygen?

    asked by Melanie
  176. Math 61

    solve step by step 2/3y=12

    asked by Jeri
  177. chemistry

    how do you calculate the formula weight for compounds of the formula [Cu(NH3)x)]SO4.H20 where x= 1-6?

    asked by jen
  178. Calculus

    In calculus, the sum of an infinite geometric series whose first term is 1/20 is given by the complex fraction 1/20 _____ 1-r where r is the common ratio between the terms. Simplify this expression.

    asked by Anonymous
  179. social studies

    1. Influence of sensory programs on people with an intellectual disability.

    asked by zonabi
  180. Science

    Why are spurgeons important to theie ecosystem?

    asked by Samuel
  181. human behaviour

    Survey of new Research in intellectual disability

    asked by zonabi
  182. Physics

    For the answer to the following post, do you mean that the frequency does not depend on the radius? Posted by Johnny on Saturday, March 13, 2010 at 5:49pm. The frequency of circular motion for a charged particle moving around in the presence of a uniform

    asked by Sandra
  183. english

    please give me a good thesis statement on the topic "Aids in Africa"

    asked by joe
  184. Literature

    What influences the mood and tone of the play [in Romeo and Juliet]?

    asked by Mina
  185. English

    Could someone please clarify this sentence for me, thanks. I ain't so sure I wasn't better off in the old days.

    asked by Sara
  186. Science-Space Exploration

    Could someone please have a few moments to go through my other previous posts on Exploring Space, thanks. I need them to be checked over, and any other information would be appreciated, thanks again:-)

    asked by Sara
  187. science

    7) - An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT? A) a ball striking a wall, in which the force of the

    asked by sam
  188. 7th grade science

    what is the position of the diaphram when you make it inhale and exhale?

    asked by alice
  189. Art

    Can anyone give me any ideas for drawing a picture of an insect using the letters from the word insect? Thanks

    asked by Lewis
  190. social studies

    who wrote the senecafalls declaration? when and why

    asked by jess
  191. math

    a plastic cube has 6 different faces. each face is painted either orange, yellow or green. the cube is rolled 36 times, and the results are: orange is 12, yellow is 6, and green is 18. how many faces of the plastic cube would you expect to be painted

    asked by Terri
  192. math

    a plastic cube has 6 different faces. each face is painted either orange, yellow or green. the cube is rolled 36 times, and the results are: orange is 12, yellow is 6, and green is 18. how many faces of the plastic cube would you expect to be painted

    asked by Terri
  193. health

    An egg has all components to start life except what from sperm?

    asked by yelena
  194. Math

    For U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z} identify the following. 5) C A) {v, w, x, y, z} B) {q, r, s, t, u} C) { } D) {v, z}

    asked by Lisa
  195. english

    what does the word personification mean Thanks

    asked by Melea
  196. math

    Solve the poloynomial x^3+4x^2-x-4=0

    asked by Please help!!
  197. english

    what does the word alliteration mean. THANKS

    asked by Melea
  198. English

    What are the 6 points in formulaic drama?

    asked by Linda
  199. Biology Honours

    what's another purpose of staining bacteria besides it being a help to identify groups of bacteria? why are cells counter-stained with safranin?

    asked by Anonymous
  200. Finance

    John wants a $200,000 house. He is 40 and he retires at 65. He believes he earns 9% annually after taxes. How much must John invest at the end of each of the next 25 years to have the cash purchase price of the house when he retires?

    asked by Laura
  201. Physics

    What would be the physical features of a simplified axon? and how would it differ from a natural axon?

    asked by mm.
  202. Algebra

    41-(2x+4)< or + to 2(x+1)+x Use set-builder notation to describe the complete solution. {x/x__ __}

    asked by Liz
  203. AP USH

    true of false? When the United States refused to hand over the Philippines to Filipino rebels, a vicious guerilla war with racial overtones broke out between the former allies?

    asked by Anonymous
  204. Pre-Cal

    1)find f(g(x)) f(x) = x^2 + 2x g(x) = 1/x x^3 + 2x Is this correct? 2) solve: 3^x-1 = 10 ln 3/ ln 10 = .264 Is this correct? I am not sure how to do these. 3) Solve: 3^x+2 - 4 = 12

    asked by Hannah
  205. 10th grade

    radio 5 to 3 how many of each one totals 4000?

    asked by lexi
  206. business law

    Name of U. S. Supreme Court Justice who had the longest tenure on the Court:

    asked by kyrie
  207. Literacy

    Which graphic organizer is best to use when teaching literacy?Justify your choice

    asked by Anonymous
  208. social studies

    I know that their are many ways to say hello in japanese, but I need to know how you write hello in japanese. Please give me and answer.

    asked by shakti
  209. science

    what is mant by fuel

    asked by shahed
  210. geometry

    i need help really fast on doing, a stage five 'Ice Triangle'.....or itteration .. thank's

    asked by Adela Montie
  211. 10th grade

    how to start a comparative genra essay

    asked by Jaxlyn
  212. Exploring Space

    What force musst be overcome to a launch a vehicle into space? Would that force be weight?

    asked by Sara
  213. Algebra

    Need to know how to find x. -x/3 = 1/8 can anyone help?

    asked by Anonymous
  214. english

    now i need a sentence that goes in this exact order, adverb, verb, pronoun, adverb.

    asked by Cesar
  215. math

    11 g = ________ mg explain why

    asked by Anonymous
  216. Exploring Space

    if a satellite were to be launched with too little speed or too much speed then what would happen? If a sattellite were to be launched with too much speed then the friction in the air would make it heat up to the point where it would burn up. Earth's

    asked by Sara
  217. English

    i need a sentences. one with a pronoun then conjuction, pronoun, helping verb, verb, prep, pronoun.

    asked by Cesar
  218. chemistry

    what happens when sulphate ions are added to hydrochloric acid and then heated?

    asked by Rowman Gentles
  219. Object Orientation

    WHAT IS THE MODULARITY IN OOP? AND WHAT IS HIERARCHY? AND WHATS THE DIFFERENCE BETWEEN BOTH AND INHERITANCE?

    asked by Jordan
  220. physical education

    what is the difference between pileades and yoga

    asked by alison