Questions Asked on
March 23, 2011

  1. Spanish

    Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish. 12. C Maria knew everyone. 13. S Because he had already seen the movie, he knew what happened? 14. S The student knows the

    asked by anon
  2. Pre Algebra

    Suppose you have an after school baby sitting service. You charge a flat fee of $10 per week plus $3 per hour. The equation y = 3x + 10 represents your earnings per week for one child. Describe the y intercept. Answer: The y intercept is (0,10) but I'm

    asked by Bill Bob
  3. physics

    A force of 80.0 N is required to pull a 25.0 kg wooden toy boat at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden toy boat across the same glass surface on the planet Jupiter?

    asked by edward
  4. AP Chemistry

    what si the procedure to make a 0.10m solution of Potassium Hydroxide during a class lab?

    asked by meghan
  5. Math

    1/(b+2)+1/(b+2)=3/(b+1)

    asked by Marylyn
  6. MATH

    A local politician claims that 1 in 5 automobile accidents involve a teenage driver. He is advocating increasing the age at which teenagers can drive alone. Over a 2 month period, there are 67 accidents in your city, and only 9 of them involve a teenage

    asked by Elie
  7. Calculus

    A 24 foot ladder is leaning against a building. Let x be the distance between the bottom of the ladder and the building and let theta be the angle between the ladder and the ground. a)Express theta as a function of x. cos theta = x/24 theta = arccos(x/24)

    asked by CMM
  8. Trigonometry

    rewrite the expression in terms of the first power of cosine. cos^3(x)sin^4(x)

    asked by Kayla
  9. Chemistry

    When 2.6 ×103 g of CaCO3 are heated, the actual yield of CaO is 1.06 ×103 g. What is the percent yield? Answer in units of %.

    asked by Jack
  10. Chemistry

    Quicklime (CaO) can be prepared by roasting limestone (CaCO3) according to the reaction CaCO3(s)  −!CaO(s) + CO2(g) . When 2.6 ×10^3 g of CaCO3 are heated, the actual yield of CaO is 1.06 ×10^3 g. What is the percent yield? Answer in units of %.

    asked by Jack
  11. Chemistry

    The half-life of the first order reaction, A to products, is 53.2 s. What was the original concentration, (A)0 in moles per liter, if after 1.8 minutes, the concentration of A is 0.0783 moles per liter? Not sure whether to use integrated rate law or half

    asked by Adrianna
  12. 8th grade science

    The loudness of sound can be measured in decibels. Do you think loudness is a vector or not? Can you explain why or why not.

    asked by Kallie
  13. Physics

    When a stone is thrown into the air it's surface will be in contact with the surrounding air. Analyse the stresses existing between the stone and the surrounding air.

    asked by Daddee
  14. Physics

    When a stone is thrown into the air it's surface will be in contact with the surrounding air. Analyse the stresses existing between the stone and the surrounding air.

    asked by Daddee
  15. geometry

    A tower casts a shadow of 64 feet. A 6-foot tall pole near the tower casta a shadow 8 feet long. How tall is the tower.

    asked by Marion
  16. chemistry

    2.00 L of NO(g) at 1.00 atm and 25°C is reacted with 1.00 L of H2(g) at 2.00 atm and 25°C according to the following unbalanced equation. NO(g) + H2(g) ® N2(g) + H2O(g) Which, if either, is the limiting reactant?

    asked by josh
  17. chemistry

    4.70 g of sodium bicarbonate (NaHCO3)is dissolved in 500 mL H2O. What is the pH of this solution? Assume constant volume.

    asked by joya
  18. Chemistry

    An excess of aqueous AgNO3 reacts with 24.5 mL of 5 M K2CrO4(aq) to form a precipitate. What is the precipitate? Answer: Ag2CrO4 What mass of precipitate is formed? Answer in units of g.

    asked by Mary
  19. Engllish Grammar

    Help me to identify the sentence structure of this sentence. "Holmes is called in to help solve a mysterious problem"

    asked by Ram
  20. Statistics and Probability

    A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer Coca-Cola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these

    asked by Adam
  21. life orientation

    making responsible choice

    asked by mthobysy
  22. english

    HELP!!!!!!! i need a primary and secondary source about Maria Lock.

    asked by temp
  23. math

    Set up the general equation from the given statement: m is proportional to the square of n and inversely proportional to both y and x.

    asked by cay
  24. History

    In 1968 Democratic Convention in Chicago. What were the protestors so unhappy about?

    asked by David
  25. US History

    Question 1 (Multiple Choice Worth 1 points) Around the turn of the century, African Americans moving to cities in the North experienced substantially less racism than did African Americans in the South. more opportunities to become skilled workers than

    asked by Andrew
  26. Maths

    determine if this is a function? y= x show working method please

    asked by Mathsnewbie
  27. Math

    A boat in calm seas travels 19 km east and 32 km south. Find the distance and direction of the trip, relative to the south. What is the distance? What is the direction? I'm confused about how to solve this problem. Could someone show me the steps?

    asked by Lisa
  28. math

    A geologist at point A measures the distance and angle of elevation to two columns of the Glen Rose formation in Texas. If the distance AS=796 ft and the distance AN=850 ft, compute the difference in the heights of the two columns to the nearest foot. What

    asked by Anonymous
  29. AP United States History

    Instructions: Use the following documents (most) and your knowledge of the period to answer the question. Question: Evaluate the following statement: "By the time of Abraham Lincoln's election in November of 1860, there was significant support in the North

    asked by Isabella
  30. Physics

    How many calories are needed to change 1 gram of 100 degrees Celsius boiling water to 100 degrees Celsius steam?

    asked by Aria
  31. math

    how do you write 22th march 2011 in 5 letters without using numbers

    asked by thasleem
  32. English - Native speakers

    Thank you for all your help till now! Another questions: Can you please paraphrase the following sentence because I just don't get the meaning of it: In the same interview, she cited her lifelong acquaintance with fear as the reason for her relative

    asked by Mark
  33. Science

    Identify the parts of the body in which mitosis occurs

    asked by Musibaba
  34. chemistry

    What quantity of solid compound? 300ml of 4% (w/v) ammonium chloride.

    asked by karen
  35. chemistry

    What quantity of solid compound? 300ml of 4% (w/v) ammonium chloride.

    asked by akshay
  36. programming

    How to integrate / combine two different programs together ??? :/

    asked by Nelly
  37. Microeconomics

    Mrs.Simpson buys loaves of bread and quarts of milk each week at prices of $1 and 80 cents, respectively. At present she is buying these products in amounts such that the marginal utilites from the last units purchased of the two products are 80 and 70

    asked by Joanne
  38. english

    how does the first ten mins of the film remember the titans capture the audiences attention?

    asked by jenny
  39. Maths

    Brent's normal wage is $672 for a 40 hour week. He worked overtime and earned $873.60 in one week. How many hours of overtime did he work if he was paid double time for the overtime worked? Method please

    asked by Musibaba
  40. maths

    The parabola y2 = 4ax, where a > 0, and the rectangular hyperbola xy = C2, where C > 0, intersect at right angles. Show that the tangent and normal to either curve at the point of intersection meet the x-axis at T and N where TN = 2pa, where p is an

    asked by lia
  41. Analytic Goemetry

    Find the equation of the parabola whose axis is horizontal, vertex on the y-axis and which passes through (2,4) and (8,-2).

    asked by AJ
  42. Analytic Goemetry

    Find the equation of the parabola with axis parallel to the x-axis and passing through (3/2,1),(5,0) and (-1,2).

    asked by AJ
  43. Biochemistry I

    Carbohydrates provide organisms with ..... and .....?

    asked by Ally
  44. Chemistry - Energy and Change rev (help+check)

    so i was revising for a test next week, and i had problems with the below designing question, so could someone please help me out. 54. The caloric content (energy content) of foods is measured using a bomb calorimeter. A sample of food is burned in oxygen,

    asked by Babelii
  45. chemistry - energy and change rev (help)

    the below 2questions i could not answer while revising for this chapter pls help me out a little. 58. When a vehicle is parked in the sunlight on a hot summer day, the temperature inside can approach 55°C. One company has patented a non-CFC propelled

    asked by Babelii
  46. physics

    if the initial velocity is .05 m/s and its final is 1.3 m/s then how much energy is lost to friction

    asked by bill
  47. english

    what does juliet ask romeo to do and what does she promise to do

    asked by rachel
  48. geometry

    find square root of 596 step by step

    asked by julian
  49. algebra

    Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare how quickly each

    asked by peg
  50. Math

    One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the 2 pumps, working together, to empty the pool? Is the answer 2 11/12 days (3 days)

    asked by Jaison
  51. physics

    A 13.0 {\rm g} plastic ball is dropped from a height of 2.80 {\rm m} and is moving at 3.20 {\rm m/s} just before it hits the floor. How much mechanical energy was lost during the ball's fall? delta E mech = ____ J

    asked by nancy
  52. Programming

    How come anytime I ask a question about programming or SQL on this website...I can never get any help?

    asked by Kwadwo
  53. business managment

    how might a walmart representative respond to the negetive criticism that might arise as result of sighting a new facility in a community ranging from traffic congestion to anti-union sentiment to unfair competition?

    asked by Aisha
  54. english

    where can I find a ghost song for my book report?

    asked by panda
  55. PreCalculus

    "A kite is flying 100ft off the ground, and its line is pulled taut. The angle of elevation of the kite is 43 degrees. Find the length of the line."

    asked by bill
  56. To Katey

    This is not a "let's gather opinions" website. If you have a real homework question (and don't expect others to do your thinking for you), please repost correctly, including the correct school subject.

    asked by Writeacher
  57. critical thinking

    A paradigm shift brings a fresh way of looking at the world. Give an example from the field of medicine that shows how normal science has experienced a paradigm shift in the last 200 years. For example, at one time, physicians did not believe that germs

    asked by rita
  58. PHYSICS HELP!

    A frictionless roller coaster is given an initial velocity of v0 at height h = 24 m . The radius of curvature of the track at point A is R = 31 m. The acceleration of gravity is 9.8 m/s2 a)Find the maximum value of v0 so that the roller coaster stays on

    asked by john
  59. psychology

    Is our inability to predict emotion beneficial? Why or why not?

    asked by cornell
  60. Calculus

    A wizard with a long beard and bright, flaming eyes places a table in front of you. On the table are two circular rings resembling frisbees. The wizard motions to the table. "We call them Galadriel rings after the great elf of Middle Earth, and we use the

    asked by Roberta
  61. English

    Swimming Strokes by Lee Carroll Paragraph 2: When most people think of swimming, they think of the crawl stroke. It involves flutter kicking with your legs as you pull yourself through the water with your arms while alternating your breathing from side to

    asked by katelyn
  62. statistics

    a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval

    asked by Ashley
  63. English

    Swimming Strokes by Lee Carroll Paragraph 3: The second type of stroke-the breast strok-is my favorite, since it feels the most natural. Here the kick became very important. In the past, the frog kick was popular, but today this had been largely supplanted

    asked by katelyn
  64. legal terminology

    Defamation through speech or another heard medium is known as A. libel. B. slander. C. damage. D. damage. my answer B

    asked by angel
  65. English

    Errors in Paragraph 2 in Swimming Strokes by Lee Carroll are and brush for subject-verb agreement, right-arm pull, left-arm pull, right-arm pull and breathe on the left side for parallelism, and your for pronoun-antecedent agreement. Are these correct?

    asked by katelyn
  66. Honor Stoichiometry

    2AgNO3 + BaCl2 ==> 2AgCl + Ba(NO3)2 How many grams of silver chloride are produced from 5 g of silver nitrate reacting with an excess of barium chloride?

    asked by Brit
  67. geometry

    The shortest side of a polygon of area 196 sq. in. is 4 in. long. Find the area of a similar polygon whose shortest side is 8 in. long.

    asked by alex
  68. math

    In 2010 a city raised $5,999,400 in tax revenue by charging each taxpayer the same amount. For 2011 there has been a net loss of 12 taxpayers, necessitating an increase fo $200 per taxpayer in order to maintain the tax revenue of $5,999,400. How many

    asked by John
  69. English

    but are the any errors for pronoun-anttecedent agreement in paragraph 2 for Swimming Strokes by Lee Carroll

    asked by katelyn
  70. Physics

    Two cars crash into each other at an intersection on a very icy road. One 3,000 lb car is traveling 45 mph NW. The other, weighing 2,000 lb, is traveling 30 mph E. After the collision, their bumpers lock together. What is the velocity of the wreck as it

    asked by Sara
  71. history

    What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? A) atomic detente B) nuclear deterrence C) a combined NATO army D) French and German rearmament

    asked by David
  72. English

    Swimming Strokes by Lee Carroll Paragraph 4: One of the most easiest strokes for people who are just learning to swim are the backstroke because the swimmer does not put their faces in the water. Your nose and mouth stay above the water, and they can

    asked by katelyn
  73. English

    So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement that begins with To me...getting the rhythm of your breathing down

    asked by katelyn
  74. English

    So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement that begins with To me...getting the rhythm of your breathing down Your

    asked by katelyn
  75. English Question [Dante's Inferno]

    I've just got a couple questions on the book, what are the two parts of the'' Divine Comedy?'' I've got Cantos, but I still need the other one and I can't fidn it in the paper I'm reading off of. Thanks -Allyson

    asked by Allyson
  76. English

    Swimming Strokes by Lee Carroll Paragraph 4: One of the most easiest strokes for people who are just learning to swim are the backstroke because the swimmer does not put their faces in the water. Your nose and mouth stay above the water, and they can

    asked by katelyn
  77. English

    Identify any improper verbal usage in each sentence. Each sentence has an error. Write the correct form of the verb. We appreciate you not smoking near the building entrance.

    asked by Sarah
  78. English

    So in paragraph 2 in Swimming Strokes by Lee Carroll there is only one error in pronoun-antecedent agreement such as getting the rhythm of your breathing down

    asked by katelyn
  79. Spanish 6th grade

    How do I say a ham sandwich or a cheese sandwich? For cheese sandwich is it el sandwich de queso? For ham sanwich is is el sandwich de hamon? I'm not sure how to spell ham

    asked by Sally
  80. Calculus - evaluating integrals

    I'm really having trouble with this current topic that we're learning. Any explanations are greatly appreciated. Evaluate the integrals: 1.) ∫ (2-2cos^2x) dx 2.) ∫ cot3x dx 3.) ∫ ((e^(sqrt x) / (sqrt x) dx))

    asked by Amy
  81. English

    I have to compare and constrast the funeral orations of Mark Antony and Marcus Brutus. What I need is a thesis statement for this paper and everything I come up with sounds lame. I'm not getting the message across. Could you help me?

    asked by Brett
  82. Pre Calculus

    Verify the identity: cos x + sin x tan x = sec x.

    asked by Kim
  83. General knowlegde

    How to write 23th march 2011 in 5 letter without using number

    asked by Rahul
  84. English

    I have to compare and constrast the funeral orations of Mark Antony and Marcus Brutus. What I need is a thesis statement for this paper and everything I come up with sounds lame. I'm not getting the message across. Could you help me?

    asked by Brett
  85. math

    what is the area of circle with the diameter of 15 feet, rounded to the nearest whole number?

    asked by black mamba
  86. algbra

    Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare how quickly each

    asked by peg
  87. history

    many scientists who helped develop the atomic bomb for the United States A.were hired by the joint authority of the U.S. England and the Soviet Union B.made it known that they felt the project should not be kept secret C. had escaped from Fascist and Nazi

    asked by sharice
  88. Math

    Rchel has 14 red, 9 blue, and one yellow towel. In haw many ways can the towels be arranged if the towels of the same colour must be side by side?

    asked by Tina
  89. chemistry

    is air heavier than carbon dioxide

    asked by ilirjana
  90. IT/210

    Assignment: Chapter 5 Programming Problems · Complete Programming Problems 1 and 2. · Provide the analysis, pseudocode and test cases using the template submitted in Week 6 only (no diagrams are required). Chapter 5 Programming Problem Maximum Points

    asked by kevin
  91. History

    What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? I think that the answer might be= B) nuclear deterrence, is this correct? A) atomic detente B) nuclear deterrence

    asked by David
  92. Music

    Can you please check my answers. 1. A lyrical movement or piece for solo voice with instrumental accompaniment is called a/an A. ostinato. B. aria. C. operetta. D. chorus. 2. What is the difference between an oratorio and an opera? A. An opera is staged

    asked by Rachel
  93. English

    After writing a paragraph about a movie how would you put three comparative and three superlatives?

    asked by Kathy
  94. Physics

    A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless

    asked by Jacob
  95. maths

    height=6 feet length=5 feet breadth=4 feet what is the volume of the container in liters?

    asked by help
  96. For Lia - question from this morning

    I took some time to work out your rather "nasty" Calculus question. Take a look at it and see if it matches your expected result. http://www.jiskha.com/display.cgi?id=1300878253

    asked by Reiny
  97. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe
  98. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe
  99. science

    julie carried out a chemical reaction using magnesium and an acid the products of the reaction were magnesium chloride and hydrogen. julie collected a test tube of the hydrogen. describe what she should do to show that it was hydrogen.

    asked by chloe
  100. WRITING SKILLS PART 1

    Which of the following topics would lend itself only to a formal style of writing? A. Why Living in the Country Is Better Than Living in the City B. How I Lost 10 Pounds C. Folk Songs I Have Sung D. Psychological Effects of Nuclear Weapons

    asked by justine
  101. math

    If you add 2 1/2 plus 3 yards and 6 inches and 6 1/3 yards. How many yards do you have?

    asked by JUNIOR C
  102. math

    If you add: 2 1/2 plus 3 yards and 6 inches and 6 1/3 yards. How many yards do you have?

    asked by JUNIOR C
  103. Calculus

    Find the limit lim as x approaches (pi/2) e^(tanx) I have the answer to be zero: t = tanx lim as t approaches negative infi e^t = 0 Why is tan (pi/2) approaching negative infinity is my question?

    asked by NY-Calc
  104. maths

    height=6 feet length=5 feet breadth=4 feet volume of the container=120 cubic feet how do you convert it into litres?

    asked by help
  105. calculus

    Let q(x)=(x^4)(e^-x). Calculate q'(x). Use q'(x) to determine whether q(5)q(6) (do not use a calculator). Explain your reasoning.

    asked by chelsea
  106. calculus

    It is estimated that an annual advertising revenue received by a certain newspaper will be R(x)=0.5x^2+3x+160 thousand dollars when its circulation is x thousand. The circulation of the paper is currently 10,000 and is increasing at a rate of 2,000 per

    asked by chelsea
  107. science

    as a satellite goes round the earth the earth turns on its axis. some satellities are always above the same place on the earths surface. how many hours do these satellities take to complete one orbit.

    asked by maryjane
  108. Math

    A fence is to be built to enclose a rectangular area of 200 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 13 dollars per foot. Find the length L and the width W

    asked by Thomas
  109. PROBABILITY

    There are 100 patients in a hospital with a certain disease. Of these, 10 are selected to undergo a drug treatment that increases the percentage cured rate from 50 percent to 75 percent. What is the probability that the patient received a drug treatment if

    asked by kim
  110. math

    what's the 10%of 150,000.

    asked by laura
  111. Pre Calculus

    Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm. Round your answer to the nearest tenth.

    asked by Kim
  112. physics

    A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

    asked by HARD!!!!
  113. math

    in triangle abc angle b is 5x angle a and c is 16 degree less than 4 times angle a the size of angle a b c in decimal is

    asked by elaine
  114. math

    A cross section of a hollow circular pipe shows that its inner diameter is 2 1/10 inches and that the pipe is 3/5 inch thick. What is its outside diameter?

    asked by JUNIOR C
  115. Chem

    Determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4 . 12H2O

    asked by Nina
  116. physics

    A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

    asked by need help as soon as possible
  117. chemistry

    The redox reaction: O3SOOSO3^2− + Cr^3+ -> HSO4^− + Cr2O7^2− is carried out in aqueous acidic solution. Which elements are undergoing changes in oxidation state? I thought it would be S and Cr. For the balanced equation, I got 3O3SOOSO3+Cr^3+ + 13H^+

    asked by Eddy
  118. Math

    Can you please check my work since my professor wont. Thanks 50% of 45 solution=90 Predict the height of a woman who's humerus is 40 cm long using H(x)=2.75x+71.48 solution= 181.48cm Trains A and B are traveling in the same direction on parallel tracks.

    asked by Mio
  119. algebra 2

    Use the function to answer the question. h(x) = 4|x| 3 What is the value of h(6)? (Points : 4) 27 21 21 27

    asked by jason
  120. Discrete Math

    Use mathematical induction to prove the truth of each of the following assertions for all n ≥1. 5^2n – 2^5n is divisible by 7 If n = 1, then 5^2(1) - 2^5(1) = -7, which is divisible by 7. For the inductive case, assume k ≥ 1, and the result is true

    asked by Francesca
  121. English

    I had to write a brief review on a movie and needed five adverbs and five adjectives and three superlatives and three comparatives here is what I wrote.The supporting character I was most impressed with was Frenchie. She did a terrific job, both in her

    asked by Kathy
  122. geometry

    A circle of diameter 2 inches has its center at the center of a square with 2-inch sides. Find the area of the region that is inside the square and outside the circle.

    asked by taylor
  123. science

    john has a bike when john gets on the bike, the force on each tyre increases. what happens to the area of tyre in contact with the road?

    asked by claire
  124. MATH

    WHAT IS THE TOTAL LENGTH OF 32 PIECES OF WOOD , IF EACH PIECE IS 2 3/16 INCHES LONG?

    asked by JUNIOR C
  125. maths

    all the angles in order

    asked by katelyn
  126. english vocabulary spelling

    the_____ was a conflagration,causing serveral buildings great damage

    asked by nina
  127. statistics

    Indicate whether the given statement could apply to a data set consisting of 1,000 values that are all different. a. The 29th percentile is greater than the 30th percentile. b. The median is greater than the first quartile. c. The third quartile is greater

    asked by DEE
  128. physics

    a boy who can generate 500 w runs up a flight of stairs in 5.0 s.how high are the stairs if the boy has a mass of 62 kg.

    asked by Anonymous
  129. chemistry

    calculate the enthalpy of formation, per mole, of sucrose, C12H2211O(s). C12H22O11(s) + 12O2(g) --> 12CO2(g) +11H2O(l) deltaH=-5.65*10^3 kJ

    asked by Stacy
  130. chemistry

    calculate the enthalpy of formation, per mole, of sucrose, C12H2211O(s). C12H22O11(s) + 12O2(g) --> 12CO2(g) +11H2O(l) deltaH=-5.65*10^3 kJ

    asked by Stacy
  131. History

    Does anyone know how to create a timeline tracking the major themes/paradigm shifts in American History. I am not sure what the format for a Timeline. Tammy

    asked by Tammy
  132. Chemistry

    A penny has a mass of 2.5 g and the moon has a mass of 7.35*10^22kg. What is the mass of 1 mole of pennies? How many moles of pennies have a mass equal to the mass of the moon?

    asked by Mal
  133. Chemistry

    A penny has a mass of 2.5 g and the moon has a mass of 7.35*10^22kg. What is the mass of 1 mole of pennies? How many moles of pennies have a mass equal to the mass of the moon?

    asked by Mal
  134. English

    Can you check these sentences for me, please? Thank you. 1)The setting of the novel is ambivalent since it seems to lie halfway between England and Scotland. 2) Utterson finds out that Dr Jekyll has created a potion, which enables him to release his evil

    asked by Mike
  135. chemistry abs spectrum and wavelength

    Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the

    asked by mary
  136. PHYSICS

    2 pool balls of equal mass experience a perfectly elastic head on collision. 1 ball is traveling at 2m/s and the other at 3m/s in the opposite direction.What is thier speed just after impact? I know the balls swap speed and change direction but can't find

    asked by mark
  137. Math

    A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

    asked by April
  138. NEED YOUR HELP ASAP

    CAN YOU HELP ME TO ILLUSTRATE QUESTION BELOW.. HOW IS CONTROL SIGNIFICANTLY APPLIED IN BUDGETING?

    asked by jessie
  139. algebra

    A research lab is planning to explore the North Pole. Ten members of the lab each have a dog team. There are 56 dogs in all. If there are only 7- and 5-dog teams, how many of each will there be

    asked by ASAP PLEASE
  140. geometry

    find the perimeter of an equilateral triangle with one side that measures 9.6 centimeters

    asked by john
  141. English

    The Victorian Age is known as a time of: A. liberal ideas B. carefree living C. conservative and strict ways of life. D. none of the above I think it's C?

    asked by ant
  142. Statistics

    Of 100 people who were given a vaccine,80 developed immunity to a disease.the 98% interval on the proportion of people developing immunity is?need help

    asked by Joel
  143. English

    Realism differs from Romanticism in that realism: A. focuses on negative and Romanticism focuses on positive B. portrays life as it is and Romanticism on how life should be. C. uses details and Romanticism uses emotion. D. Both B and C I think it's D?

    asked by ant
  144. AP Calculus

    Determine dy/dx if xsiny=artany i did (x)(cosy dy/dx) so far

    asked by Leanna
  145. people

    ow did william the conquer laws promote the loyalty of his subject

    asked by Alicia
  146. Math

    How do i solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

    asked by jackster
  147. management.......please help me

    can you help about this question. thank you how is control significantly applied in budgeting?

    asked by jessie
  148. Science-Motion

    How could an object accelerate while still traveling at a constant speed

    asked by mickey
  149. microbiology

    Lactobacillus species ferment glucose, as demonstrated by the snyder test. What other metabolic functions might they perform judging by the list of ingredients: Yeast extract, agar, sodium chloride, pancreatic digestive casein. Thank you

    asked by Mary'
  150. microbiology

    Lactobacillus species ferment glucose, as demonstrated by the snyder test. What other metabolic functions might they perform judging by the list of ingredients: Yeast extract, agar, sodium chloride, pancreatic digestive casein. Thank you

    asked by MaryAnne
  151. Math

    A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

    asked by Marylu
  152. Chemistry

    NF3 and PF5 are stable molecules. Write the electron-dot formulas for these molecules. On the basis of structural and bonding considerations, account for the fact that NF3 and PF5 are stable molecules but NF5 does not exist

    asked by Tyler
  153. Chemistry

    The boiling points of the following compounds increase in the order in which they are listed below: CH4 < H2S < NH3 Discuss the theoretical considerations involved and use them to account for this order.

    asked by Ariana
  154. Math

    The body consists of 7/10 water. Is more than 1/2 your body water? Explain.

    asked by Tevin
  155. Calc. checking answer

    Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y=

    asked by C
  156. History

    What aspects of Japanese culture were evident in samurai training?

    asked by Jess
  157. chem

    24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O(l)+ O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

    asked by janet
  158. chemistry

    What two metals from the lanthanides of the activity series will not generate hydrogen gass when treated with an acid?

    asked by simonne
  159. chemistry

    What two metals from the lanthanides of the activity series will not generate hydrogen gass when treated with an acid?

    asked by simonne
  160. chemistry

    24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O (l) + O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

    asked by janet
  161. Chemistry

    What makes Permanganate such a good oxidizing agent?

    asked by Jane
  162. english

    what significance do the lions on the beach have for the old man, from ernest hemingway the old man and the sea?

    asked by cc
  163. Algebra

    using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x + 24y = 24 27x – 15y = -15

    asked by Miguel
  164. Math

    If the perimeter of the rectangular ball field is 1 kilometer which of the following could be the field's dimensions? L=312m W=188m or L= 1/2 m W = 1/2 m

    asked by Alex
  165. Science

    If the perimeter of the rectangular ball field is 1 kilometer which of the following could be the field's dimensions? L=312m W=188m or L= 1/2 m W = 1/2 m

    asked by Alex
  166. Spanish

    64. Les sirven los frijoles refritos a. a mí b. a él c. a ellos d. a nosotros C? I don't really get it.. 65. ¿Qué _____ a Uds.? a. le falta b. les falta c. le faltan d. nos falta Also don't get this one. 66. "¿Van a salir en seguida?" "No, ya _____."

    asked by mysterychicken
  167. geometry

    donald's garden is rectangular the garden is 14 metres long it's perimeter is 47 metres how wide is the garden

    asked by cynthia
  168. PHYSICS

    A 33 cm-tall, 6 cm-diameter plastic tube has a sealed bottom. 266 g of lead pellets are poured into the bottom of the tube, whose mass is 45 g, then the tube is lowered into a liquid. The tube floats with 5 cm extending above the surface. What is the

    asked by Alexia
  169. A & P

    Trace the anatomical pathway of the neural signal that must be sent from the primary motor area of the brain to the appropriate muscles of the arm and shoulder in order to lift a glass of water to drink.

    asked by Anonymous
  170. math

    A rectangular garden is two feet longer than it is wide. If the width is doubled, fifty extra feet of fencing will be needed to keep out the rabbits. What are the dimensions of the original garden

    asked by Marylu
  171. geometry

    216 in cubed is the volume of a figure 27 in cubed is the volume of a similiar figure what is the scale factor?

    asked by Nasser
  172. Calculus Please Help

    Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

    asked by Abi
  173. chemistry

    how do you prepare 400 mM 100ml H2SO4 from 1M H2SO4

    asked by hadja
  174. Geometry

    I need points for making a 13ft.x 18ft eliptical

    asked by Steve
  175. geometry

    this arc contains 36 degrees and its length is 7 units what is the cicruference

    asked by Anonymous
  176. micrbio

    Lst possible reasons why the slite test is not appropriate for detecting free coagulase.

    asked by microbio
  177. Science

    Do neurons send electrical messages to the brain to tell the body what to do?

    asked by Michelle
  178. PreCalc

    I'm not sure how to solve these with calculator. sec x = -2 , π ≤ x ≤ 3π sinθ=0.1473, 0°≤θ≤90° cosθ=0.7563, 0°≤θ≤90°

    asked by Sam
  179. math

    alexis sells stuffed animals.she sells a stuffed elephant for $34.95,and the sales tax is 8% of the sales price.about how much is the sales tax on the elephant?

    asked by jasmine
  180. HELP--math

    Of one hundred students surveyed: 70 like basketball, 52 like football, 61 like baseball, 29 like baseball and football, 39 like football and basketball, 42 like basketball and baseball, 27 like all three sports. If a student is chosen at random, what is

    asked by Marylu
  181. English

    I urgently need to find a site where I can listen to the last Chapter of Dr Jekyll and Mr Hyde by Stevenson. I really hope you can help me! Thank you very much.

    asked by Mike
  182. History

    The evolution of the socio-political milieu during the colonial period, including Protestant Christianity's impact on colonial social life. Can any one give me some insite? Tammy

    asked by Tammy
  183. math

    If a 4th grade with 140 students has 3 boys for every 4 girls how many are girls? how many are boys?

    asked by lovecaandy
  184. trigonometry

    tanx-cotx/tanx+cotx=1-2cos squardx

    asked by wayne
  185. Math

    tan(x)=5 sin(x) for interval -π < x < π

    asked by Abby
  186. science

    what r some good websites to look up river streams ponds lakes wetlands marsh and swaps plants and animals

    asked by kate
  187. Chem

    Some ethylene glycol, HOCH2CH2OH, is added to your car's cooling system along with 4.4 kg of water. If the freezing point of the water-glycol solution is -15.0°C, how many grams of HOCH2CH2OH must have been added? I used the equation: 15 celcius = 1 x

    asked by Mark
  188. chemistry

    What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 500 mL of H2O

    asked by brooke
  189. chemistry abs spectrum and wavelength analysis

    Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the

    asked by mary
  190. math

    Use a tangent function to estimate the grade resistance of a 2200-lb car travelling on a 2.4° grade. Round your answer to the nearest pound.

    asked by Meg
  191. math

    What are four ways you can make $3.85 using one type of coin

    asked by sam
  192. math

    Use a tangent function to estimate the grade resistance of a 2200-lb car travelling on a 2.4° grade. Round your answer to the nearest pound.

    asked by Meg
  193. MATH

    350 lbs of flour were poured into 4 3/8 lbs packages. how many packages were filled?

    asked by JUNIOR C
  194. Grammar

    Can you help me with these sentences.Review the following sentences. Some of them are correct, whereas others contain an error with a commonly confused word. 1.The diplomats are doing what they can to restore peace. 2.I should of written down where I last

    asked by Lacey
  195. geometry

    what is the length of any diagonal of a regular pentagon with a side of 20mm ?

    asked by Katie
  196. algebra

    how do I factor a polynomial completely, please tell me step by step.

    asked by Kreidan
  197. social studies

    i am a 7th grd and i have to do a three page eassy on been respectful it due by 3/23/11

    asked by rose
  198. math

    Of one hundred students surveyed: 70 like basketball, 52 like football, 61 like baseball, 29 like baseball and football, 39 like football and basketball, 42 like basketball and baseball, 27 like all three sports. If a student is chosen at random, what is

    asked by Marylu
  199. precalculus

    A population doubles every 30 years. Assuming exponential growth find the following: annual growth rate: % continuous growth rate: %

    asked by josh
  200. reading

    should have been 9 letters and the 6th one is a U

    asked by John
  201. management, subject

    please is anyone can help me this question. .different management function and discuss each function.

    asked by jessie
  202. microbio

    Why is it important to use fresh cultures in Coagulase test than in a test medium?

    asked by microbio
  203. physics

    A certain roller coaster has a circular, vertical loop of radius 10 meters, such that at its top the riders are upside down. How fast does the roller coaster move at this point if the riders feel perfectly weightless when passing the top of the loop?

    asked by peter
  204. math

    What does rule mean in second grade math

    asked by Maeve
  205. physics

    a very thin piece of copper wire has an electrical resistance of 20,000 Ohms. You connect its ends to a regular 2.0 Volt battery. How much power does it draw? Let's assume that this little piece of wire initially contained one trillion (that's a one with

    asked by john
  206. geometry

    what is the are of a parallelogram if it is 2 feet tall and 6 feet wide

    asked by alle
  207. reading

    need help with a crossword puzzle the words given are hale; hail;;bunt it has 5 letters and the last letter is T

    asked by John
  208. math

    simplify (6x^3-7x^2+3x+9)/(3x+9)

    asked by keith
  209. language

    From a story,how do you draw a conclusion

    asked by jordan
  210. Calculus

    Fill in the following table, where E(x) denotes the error in approximation of f(x) by T(x). x - 2 x 3 2.1 2.01, 2.001 f(x) T(x) E(x)

    asked by Cecille
  211. chemistry

    briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.

    asked by Anonymous
  212. survey of economics

    How would you compute changes in Microsoft’s volume of output from one year to the next? How would price changes affect your computations?

    asked by sue
  213. chemistry

    25ml of 0.05M of NaOH and the average volume of HCl is 17.7ml after titration and the concentration of HCl is 0.1028M. Find the [OH] eq (from titration). How do u solve this...

    asked by roshan
  214. chemistry

    What mass percent of a solution with 28.5 g of H2O2 and 300.0 mL of water?

    asked by Anonymous
  215. Chemistry

    How can you measure 20 mg. of salt?

    asked by Jamie
  216. history

    According to legend these people fought a long war with the people of troy;a city in turkey. What was the name of the war.(has to do with Anceint Greece)

    asked by renee
  217. math

    How can the teacher differentiate instruction when teaching number sense or mathematical operations? Please remember differentiate is for all levels (high, medium, low, ESL, and others)

    asked by Anonymous
  218. Applications

    Determine the median of the following numbers25,28,22,27,25,20/30,23,27, and 29

    asked by Jessica
  219. physics

    Analyze the radial distribution of the H-atom at the 2s state. How are the maxima situated with respect to the minimum? Is the “golden ratio” involved?

    asked by sweety
  220. physics

    Consider two non-interacting Fermions (half-integer spin) confined in a “box”. Construct the antisymmetric wave functions and compare the corresponding ground-state energies of two systems; one with particles of identical spin and the other with

    asked by sweety
  221. chemistry

    Analyze the radial distribution of the H-atom at the 2s state. How are the maxima situated with respect to the minimum?

    asked by everest
  222. Acids and Bases

    NaOH was added to 1.0 L of HI(aq) 0.40 M. Calculate H3O in the solution after the addition of .14 mol of NaOH. Calculate H3O in the solution after the addition of 0.91 mol of NaOH.

    asked by Kaitlyn
  223. English

    Can you please help me check these sentences? Thank you very much. 1.Some schools valued their pupils' athletic prowess more than their scholarly ones. 2.Factory owners were also oblidged by legislation to teach their duty (? they apprentices). 3.One of

    asked by Mike
  224. Science

    How do you separate a mixture of salt,pepper, and iron filings

    asked by Emily
  225. math

    Milan's gas tank is 1/5 full. After he buys 6 gallons of gas, it is 7/10 full. How many gallons can Milan's tank hold?

    asked by Jen
  226. Math

    What angle equal to 6/8 turn?

    asked by Gina
  227. Chemistry

    Is [PF5Cl]- polar?

    asked by cassandra
  228. chemistry

    100ml of 0.05M of NaOH is added to 0.5g of Ca(OH)2. find the [OH] (from Ca(OH)2)

    asked by roshan
  229. Calculus Please Help

    Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.

    asked by Cecille
  230. math

    How much intrest will u earn on a 50 0 deposi placed in a asavings accoun for 6 months if you are paid at a simple intrest rate of 5 percent

    asked by Anonymous
  231. Chemistry

    Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) ! 4 PCl3(g) . A sample of PCl3 ofmass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the percentage

    asked by Jonathan
  232. Chemistry

    How many atoms of each element are present in five formula units of calcium permanganate?

    asked by Mary
  233. Chemistry

    2NaN3(s) −> 2Na(s) + 3N2(g) . If 0.65 mol of NaN3 reacts, what mass of nitrogen would result? Answer in units of g. Step by step with answer please! I'm begging!

    asked by Harry
  234. English

    Can you please chech these very last two sentences of the day? Thank you. I'm playing on my Nintendo DS these days. Where are you playing these days? Darwin eliminated the possibility of the creation also if this idea conflicted with the teachings of the

    asked by Mike
  235. Chemistry

    Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) --> 4 PCl3(g) . A sample of PCl3 of mass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the

    asked by Harry
  236. Physics

    The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. To accomplish this, the mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What

    asked by John
  237. AP Calculus

    I previously posted this but had a mistake in it. Determine dy/dx if xsiny=arctany i did (x)(cosy dy/dx)+(1)(siny)=dy/(1+y^2) so far

    asked by Leanna
  238. 3rd Grade Science Definicions

    It tells the location of somethind.It is spesific.Every place on a map has this.What is it?

    asked by Kristiana
  239. math

    Two of these statements are false. Identify them. 1.4x12>3x15 2.96/231+13 Answers: 1. 48>45 2. 4844 48

    asked by Mona
  240. Soc-120

    I have to start writing an essay for my sociology class and this is the topic I have to write about: "Racial discrimination and Hispanics in the United States" I have to come up with 1800 words on this topic I was wondering if you could help me come up

    asked by Nikol
  241. Calculus

    Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y=

    asked by C
  242. History

    What was the second most big city state in greece. now the first is sparta but what is the other!!!

    asked by Alyssa
  243. English

    I have a question if these are correct.. Thank you for your help! 11. The officers are government officials. (LV= are, Pn=officers) 12. Their presence was necessary in the far north county in the early days. (lv= was, Pa=necessary) 13. Now they are famous

    asked by ann
  244. math

    A quiz has 10 questions Aaron gets 3/5 of the questions right. How many questions did Aaron get right?

    asked by Kaiya
  245. chemistry

    How do I calculate 50ml of a 50mM sodium momophosphate buffer solution

    asked by PAUL
  246. Spanish

    Forma oraciones para saber la historia de amor entre Alicia y Emilio. Ojo con el uso del pretérito Model: Alicia y Emilio / conocerse / en un café Alicia y Emilio se conocieron en un café. 1.no hablarse / pero / ellos mirarse profundamente

    asked by Christopher
  247. geometry

    A guy wire is attached to the top of a 75 meter tower & meets the ground at a 65 degree angle. How long is the wire?

    asked by Abby
  248. geometry

    in a parallelogram abcd=28,bc=45,and ac=53. is the parallelogram a rectangle?

    asked by rocio
  249. Physics

    A coaxial transmission line has a solid inner conductor of radius a and a thin-walled outer conductor of radius b. The medium between the conductors has permeability (Mu)0. Find the inductance per meter of length of the line (a) if all current of the inner

    asked by sandhu
  250. Chemistry

    At what tempature will a 3.0 m solution of sodium fluride freeze?

    asked by Hailey
  251. chemistry

    how to find mass percentage

    asked by rosa
  252. Chemistry

    Calculate the boiling tempature for a solution which contains 0.325 mol of calcium phosphate (Ca3(PO4)2) dissolved into 240.0 g of water.

    asked by Hailey
  253. math

    complete the table: y= x - +4 x: +4,0,-4.-6 y: ?,?,?,?

    asked by Lucas
  254. chemestry

    balance the equations (single displacement) 1. zinc + Iron(II) Chlorine ----> 2. Zinc + Hydrogen Chlorine ---->

    asked by celina
  255. biology

    The primary reaction catalyzed by catalase is the decomposition of hydrogen peroxide to form water and oxygen, which occurs spontaneously, but not at a very rapid rate. Write a balanced equation for this reaction. (Remember that catalase is not a reactant

    asked by chaja
  256. Language Arts

    The Fairfield Rockets were true to their name last night. They blasted off early in the first quarter and didn't slow down until the final buzzer in the fourth.

    asked by Lisa
  257. English

    Have a question on Simple Verb Tenses. Need to reswrite each sentence, using the correct form of the verb in parentheses with s,ed,or will.. Thank for looking and helping me~~ 1. Long ago Plutarch___ stories of Greeks and Romans. (RELATE) Answer=related 2.

    asked by Emily
  258. math 099

    a rancher wants to use 300 feet of fencing to enclose a rectangular area of 4400 square feet. what dimensions should the rectangle have?

    asked by Anonymous
  259. Math

    Find the missing dimensions for each three-dimensional figure to the nearest tenth given the volume and other dimensions. I'm not understanding the cones too much. r=5in., v = 487in.3 How do I work it, given only the radius

    asked by Nia
  260. Language Arts

    Neither forward could be stopped. These two lit up the scoreboard with 54 points. In fact, the Rockets scored so many points that the scoreboard shorted out trying to keep up. The Rockets were just too hot to handle. The best play of the game came in the

    asked by Lisa
  261. bio chemistry

    prepare 1M 100 ml H2SO4, density 1.84

    asked by hadja
  262. CHEMISTRY URGENT!!!

    Determine the pH (to two decimal places) of the solution that is produced by mixing 30.3 mL of 1.00×10-4 M HBr with 829 mL of 5.77×10-4 M Ca(OH)2.

    asked by Colin
  263. College Chemistry

    Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous solution that is 1.50% NaOH by mass (density= 1.02g/mL).

    asked by Anonymous
  264. biology

    What effect did boiling the liver have on the reaction? Why?

    asked by chaja
  265. social studies

    What was the Fascist Party and what were their beliefs?

    asked by t.n.t
  266. bio chemistry (please help)

    prepare 1M 100 ml H2SO4. 98% H2SO4, density 1.84

    asked by hadja
  267. geometry

    calculate the area, surface area, and volume for a right rectangular prism with a length 2cm, height 5cm, and width 3cm

    asked by Amata
  268. science

    determine the correct amount of sodium hydroxide needed to react with 1.0g iron (III) chloride.

    asked by joyce
  269. MATH

    You can choose chocolate,strawberryor vanilla frozen yogurt and red,blue,green sprinkles. A sundae has one yogurt flavor and two different colora of sprinkles. How many different kinds of sundaes can your order? List them Is there 9 different possible kind

    asked by Themathperson
  270. chemistry

    Calculate the [H3O + ] for 0.42 M HCl. Answer in units of M.

    asked by Brian
  271. BIOLOGY

    What happen when you put muscle in acetic acid

    asked by chaja
  272. us history

    after containment what would be considered the us foreign policy

    asked by bill
  273. Math

    Check all that apply5/3 is the reference angle for: 2pi/3 15pi/3 7pi/3 19pi/3

    asked by Sebastian
  274. Spanish

    Forma oraciones para saber la historia de amor entre Alicia y Emilio. Ojo con el uso del pretérito. Modelo: Alicia y Emilio / conocerse / en un café Alicia y Emilio se conocieron en un café. no hablarse / pero / ellos mirarse profundamente No se

    asked by Christopher
  275. Statistics

    The amount of fill(weight of contents)put into a glass jar of spaghetti sauce is normally distributed with mean=850g and standard deviation=8g.the probability that a random sample of 24 jars has a mean weight greater than 848g is?need help

    asked by Joel
  276. Statistics

    The null hypothesis,H0:u=48,was tested against the alternative hypothesis,H1:u>48.A sample of 75 resulted in a calculated p-value of 0.102.if standard deviation=3.5,the value of the sample mean is?need help

    asked by Joel
  277. math

    a rectangle is 7 ft by 9ft. a second is similar to the first with a perimeter of 260 ft. what are the dimensions of the second rectangle?

    asked by kim
  278. Chemistry

    What is the volume of 0.129 M HCl(aq) re- quired to neutralize all of the hydroxide ions in 46 mL of 0.216 M KOH(aq)? Answer in units of mL. Answer: 77.0232 What is the molarity of Cl− ions at the stoichiometric point? Answer in units of mol/L. What is

    asked by Matthew
  279. Math

    Colors are blue, pink,red, brown,black Styles are cardigan, crewneck, v neck What is the probability of choosing a brown sweater at brown?

    asked by NeedsHelp
  280. pre calc

    Solve the lograthmic function: ln(X+5) = ln(X-1) - ln(X+1) The answer has no solution but I do not know how to come to that answer. Help is greatly appreciated!

    asked by Laura Grace
  281. math

    there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls

    asked by mar
  282. English

    if I have a quote that starts at the beginning of a sentence would I leave it as a capital letter OR lowercase letter? Ex: On ....,"He saw ...." OR On ....,"he saw ...." in the source where i'm quoting it from: "He" would be the first word in the sentence

    asked by Amy
  283. Physics

    A pulley system has an efficiency of 78.0 per- cent. The acceleration of gravity is 9.81 m/s2 . How much of the rope must be pulled in if a force of 469 N is needed to lift a 52 kg desk 2.78 m?

    asked by McCaleb
  284. Physics

    A 305 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the

    asked by Robert
  285. math

    6n2-19n+15=o (the 2 is an exponent) idk how 2 do it the teacher told us how but didn't show us plz help

    asked by Angel
  286. math

    What percentage of 13,000.00 is 8,000.00

    asked by dan
  287. Chemistry

    A solution contains a mixture of Cl- and Br- ions. Can both be positively identified? Briefly explain and write appropriate equations to support your answer.

    asked by Leah
  288. Math

    given the fonction: y=3x^2-5x and x=g(t)derivable as g(14)=-4 and g'(14)=2 calculate dy/dt in t = 14

    asked by Ralph
  289. Chm General 2

    if a student doing an experiment failed to dry the KHP before using it to standarize the NaOH solution. A) Would her calculated molarity of the NaOH solution probably be too hight or too Low?

    asked by Karla
  290. Pre Calc

    tan(x)=5 sin(x) for interval -π < x < π A) 0, 1.571 B) -1.571, 0, 1.571 C) -1.369, 0, 1.369 D) 0, 1.369

    asked by Abby
  291. math

    idk how 2 do it the teacher told us how but didn't show us plz help (the 2 is an exponent) 3b^2+b-10=0

    asked by Bella
  292. Math2

    Given f, a derivable function and y = f (x)^3 + 40√(f(x)+12) . Knowing that f(4) = -4 and that dy/dx|x=4 = 14 , calculate f’(4)

    asked by Ralph
  293. Math

    Find the probability. You roll two odd numbers and pick a vowel ( when you roll two number cubes and pick a letter of the alphabet at random)

    asked by NeedsHelp
  294. chemistry

    prepare 1M 100 ml H2SO4. 98% H2SO4, density 1.84

    asked by Anonymous
  295. Math

    You toss tails and roll an even number ( when you toss a coin and roll a number cube) Find the probability. I thought It was 1/3 but I think that is wrong.

    asked by Lala
  296. CIS

    I have the pseudocode but i am confused with this question. Modify the Pay Calculator design from Week 3 to include a loop that allows the user to continue processing employee pay until the program user wants to stop or the maximum number of employees is

    asked by Nyna
  297. chemistry

    O3SOOSO3^(2−) + Cr^(3+)+ -> HSO4^(1-) + Cr2O7^(2-). Could someone balance this redox reaction for me? I can't figure it out. Thanks

    asked by Eddy
  298. stoichiometry

    6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

    asked by jairo sanchez
  299. Chemistry-102

    what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH

    asked by Christian
  300. stoichiometry

    6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

    asked by jairo sanchez
  301. stoichiometry

    6mols of N2 are mixed with 12mol H2, according to the following equation. N2+3H2----> 2NH3 a) which is the limiting reactant? B) which chemical is in excess? c) how many moles of excess reactant is left over? d) how many moles of NH3 can be produced? e)if

    asked by Anonymous
  302. Spanish

    no hablarse / pero / ellos mirarse profundamente No se hablaban pero ellos se miraban profundamente. inmediatamente / la muchacha y el muchacho / enamorarse La muchacha y el muchacho se enamoraron inmediatamente. ellos / abrazarse / y / besarse / aquella

    asked by Christopher
  303. chemistry

    How many sodium ions are present in aqueous sodium phosphate if the sample size is 500 milliliters and the concentration is 2 Molarity?

    asked by Anonymous
  304. Chemistry

    Most chlorides are soluble in water. Give all of the formulae for the insoluble chlorides.

    asked by Bruce
  305. physics

    a 1 kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring constant of the spring is 1 n/cm. the mass is pulled downward 2 cm and released. what is the speed of the mass when it is 1 cm above the point

    asked by Jess
  306. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the reaction of barium nitrate and sodium sulfate.

    asked by Bruce
  307. Calc - Evaluating Integrals

    1.) upper bound: pi lower bound: 0 8sinx / sqrt(5-4cosx) dx 2.) upper bound: sqrt 3 lower bound: 0 4x / sqrt(x^2 + 1) dx 3.) upper bound: 1 lower bound: -1 (dx) / (3x-4)

    asked by Amy
  308. physics

    at what altitude should a satellite be placed into circular orbit so that its orbital period is 48 hours? the mass of the earth is 5.976x10^24 kg and the radius of the eatrh is 6.378x10^6 m.

    asked by Jess
  309. Chemistry

    Does the mixing of copper (I) nitrate with sodium iodide produce a precipitate? If so, give the molecular equation.

    asked by Bruce
  310. Chemistry

    Is it possible to have an acid/base reaction and produce a precipitate as a product as well? If yes, provide an example.

    asked by Bruce
  311. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the combination of potassium chloride and magnesium sulfate.

    asked by Bruce
  312. physics-telescope

    The Hubble Space Telescope (HST) can resolve objects that have a small angular separation because there is no atmospheric distortion of the light. (i.e. The HST has excellent resolving power.) Its 2.4-m-diameter primary mirror can collect light from

    asked by Trace
  313. Chemistry

    According to the Bronsted-Lowry definition of acids and bases, is water an acid or base? Provide examples to support.

    asked by Bruce
  314. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the reaction of phosphoric acid and magnesium carbonate.

    asked by Bruce
  315. Chemistry

    How many grams of water are produced from the reaction of 1L of 2 molarity hydrochloric acid with 1L of 2 Molarity barium hydroxide?

    asked by Bruce
  316. Chemistry

    What is the concentration of an acetic acid solution if 11.2 mL of 1.002 Molarity sodium hydroxide solution is needed to completely neutralize 5.1 mL of the acid?

    asked by Bruce
  317. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the reaction of sulfuric acid and barium hydroxide.

    asked by Bruce
  318. Chemistry

    Give the molecular, complete ionic, and net ionic equations for the reaction of ammonia with hydrochloric acid.

    asked by Bruce
  319. Chemistry

    How many mL of 1.211 Molarity sulfuric acid is required to completely neutralize 10.0 mL of 3.210 Molarity calcium hydroxide?

    asked by Bruce
  320. maths

    how to convert 1kg 400gms into mixed fraction

    asked by Anonymous
  321. Biology

    Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does

    asked by Mary
  322. biochemistry

    If glucose is labeled with 14C in position C-1, where does this label end-up if the glucose goes through the oxidative phase of the pentose phosphate pathway?

    asked by brian
  323. biochemistry

    4) phosphofructokinase-1 strongly inhibited by an ATP analog in which the oxygen atom joining the ƒÒ- and ƒ×-phosphorus atoms is replaced with a methylene group?

    asked by brian
  324. Chemistry (please help!!)

    a stressed chemistry student is hyperventilating into a paper bag. The student stops to wip his brow after a few breaths, and the bag is at 5.7 KPa and the temperature in the lecture hall is 24 degrees C. The bag is 0.75 L full. The student then goes at it

    asked by Celine
  325. biochemistry

    Enolase catalyzes the conversion of 2-phosphoglycerate (2-PG) to phosphoenolpyruvate (PEP). The deltaG’o for this reaction is +1.8 kJ/mol. If [2-PG] = 0.045 mM and [PEP] = 0.034 mM, what is the actual free energy, deltaG?

    asked by brian
  326. Math

    A boat in calm seas travels 19 km east and 32 km south. Find the distance and direction of the trip, relative to the south. What is the distance? What is the direction? I'm confused about how to solve this problem. Could someone show me the steps?

    asked by Lisa