1. Nuclear Physics

    Consider an alpha particle with kinetic energy E_ (alpha) which is incident on a material. Show that the distance traveled, ∆x, by the alpha particle after it has lost an amount of energy ∆E, in the material, can be found by the following equation:

    asked by A on October 30, 2012
  2. Chemistry

    When 0.20 mol of hydrogen gas and 0.15 mol of iodine gas are heated at 723 K until equilibrium is established, the equilibrium mixture is found to contain 0.26 mol of hydrogen iodide. The equation for the reaction is as follows. H2(g) + I2(g) ↔ 2HI(g)

    asked by Bea on June 11, 2017
  3. CHEMISTRY (WEBWORK)

    What is the pH of the solution created by combining 1.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH pH w/ HCl pH w/ HC2H3O2 1.20 ? ? Complete the table below: What are the pH values if you

    asked by Anonymous on July 12, 2010
  4. physics

    Bill is 35.0 m away from Tom. Both men walk in the same direction. Bill walks at 1.65 m/s and Tom walks at 1.85 m/s. From where they began, how far does Tom walk before he catches up with Bill? How long does it take for Tom to catch Bill? ****Please show

    asked by Anonymous on May 21, 2019
  5. Math simplifying mixed radicals

    Please help me simplify these following mixed radicals:: and show me how you did it cause I need to learn : I don't know how to type a square root sign so I just wrote square root and the numbers infront of the square root are supposed to be multiplied. 2

    asked by Miley on September 14, 2013
  6. Physics

    A pitcher throws a 0.192-kg baseball, and it approaches the bat at a speed of 43.2 m/s. The bat does 69.8 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.6 m above the

    asked by Elle on April 4, 2014
  7. physics

    A pitcher throws a 0.198-kg baseball, and it approaches the bat at a speed of 57.5 m/s. The bat does 85.1 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.7 m above the

    asked by Anonymous on March 19, 2014
  8. HEALTH!

    What are the four basic food safety principles that work together to reduce the risk of food borne illnesses? A. Wash, Cook, Eat, Clean B. Clean, Separate, Cook, Chill C. Clean, Cook, Store, Disinfect D. None of the above b?

    asked by Aya on July 28, 2012
  9. physics

    A 5 kg ball rolls off a 34 m high cliff, and lands 29 m from the base of the cliff. Express the displacement and the gravitational force in terms of vectors and calculate the work done by the gravitational force. Note that the gravitational force is < 0,

    asked by Anonymous on March 20, 2013
  10. Health

    What are the four basic food safety principles that work together to reduce the risk of food borne illnesses? A. Wash, Cook, Eat, Clean B. Clean, Separate, Cook, Chill C. Clean, Cook, Store, Disinfect D. None of the above d?

    asked by Sam on August 30, 2012
  11. phy

    An engine absorbs 2000j of heat from a hot reservoir and expels 750j to a cold reservoir during each poerating cycle, (i)what is the efficiency of the engine (ii)How much work is done during the cycle? (iii)What is the power output of the engine if each

    asked by kate on July 4, 2013
  12. History

    I need HELP on my history homework about Christianity in Rome. The section is "The Missionary Work of Paul": 1. Why did Paul's early life contradict what he ended up doing later in life? I think the answer to 1 might be: In Paul's early life, he explicitly

    asked by Riona on May 14, 2018
  13. physics

    A mettalic sphere of radius a carries a charge Q. It is brought in contact with an uncharged sphere of radius b . what will be the charge on the first sphere. My work I eliminated 2 options by substitution and realised that it won't be their average as

    asked by Anonymous on March 1, 2016
  14. Physics

    A pitcher throws a 0.107-kg baseball, and it approaches the bat at a speed of 31.7 m/s. The bat does 77.9 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 22.7 m above the

    asked by StressedStudent on October 9, 2012
  15. Physics Help!!!

    A pitcher throws a 0.111-kg baseball, and it approaches the bat at a speed of 37.4 m/s. The bat does 78.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 30.8 m above the

    asked by Isaac on February 26, 2012
  16. physics

    a helicopter lifts a 72kg astronuat 15m vertically from the ocean by means of a cable. the acceleration of the astronuat is 9/10. how much work is done on the astronuat by; a)the force from the helicopter and b) the gravitational force on her? just before

    asked by pema on May 1, 2017
  17. physics

    A pitcher throws a 0.168-kg baseball, and it approaches the bat at a speed of 45.2 m/s. The bat does 86.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 22.5 m above the

    asked by Anonymous on April 16, 2013
  18. computers

    The President of the Company has asked you to replace the computers in every department. The researched information must be presented in this format: A memo to the president stating the need to replace the computers. An Excel spreadsheet comparing three

    asked by lasandra on February 20, 2010
  19. Math - Probability

    I want to know that if 1 person in 50 has one blue eye and one green and you have 700 people living in an area in groups of four. What is the probability that three of those people would end up together? Would it be greater or less of one of those people

    asked by Stacey on December 15, 2006
  20. English

    I need help with this question. I just don't understand what it's asking me. Could someone tell me how I should start it, please? Thank you! Writers often communicate their themes by building clues into the story. Choose one story from Collection 4 and

    asked by Olivia on January 18, 2012
  21. business law

    I need help answering questions to a case that is in my business law book. The case is Granholm V. Heald and the questions are: What if the facts were different? Suppose that the states had only required the out-of-state wineries to obtain a special

    asked by Claire on September 17, 2010
  22. Physics

    A light, ideal spring with a spring constant k = 100 N/m and uncompressed length L = 0.30 m is mounted to the fixed end of a frictionless plane inclined at an angle θ = 30.0° as shown above. Then a mass M 0.300 kg is affixed to the end of the spring and

    asked by Jonah on October 22, 2017
  23. unknown fractions

    Is there an easier way to solve the following problem without going through 100 guesses trying to find two numbers that total de area and the perimeter. ps I'm the mom trying to explain to my kid The perimeter of a rectangular banner is 72 inches. The

    asked by Lilly on February 8, 2015
  24. Math

    A local gym charge nonmembers $ 19 per hour to use the tennis courts. Members pay a yearly fee of $300 and $4 per hour for using the tennis courts. Write and solve an equation to find how many hours you must use the tennis courts to justify becoming a

    asked by Ricky on January 7, 2008
  25. physics

    The velocity of a particle constrained to move along the x-axis as a function of time t is given by: v(t)=-(15/t_0) sin(t/t_0). a)If the particle is at x=4 m when t = 0, what is its position at t = 4t_0. You will not need the value of t_0 to solve any part

    asked by bobjahng2 on November 26, 2010
  26. Maths

    How many three digits numbers N=abc are there such that a≤b and c≤b? Details and assumptions: abc means 100a+10b+1c, as opposed to a×b×c. As an explicit example, for a=2,b=3,c=4, abc=234 and not 2×3×4=24. The number 12=012 is a 2-digit number, not

    asked by Steve on June 9, 2013
  27. Chemistry

    I'm having trouble getting the right answer for a problem, I'm hoping that by posting my work someone can help me figure out where I've gone wrong. A two-liter soft drink bottle can withstand a pressure of 5 atm. Half a cup [approximately 120 mL) of ethyl

    asked by Alexandria on December 31, 2006
  28. Math

    I am having ahard time solving this problem and am not good with story problems, could someone please help. Can you show how you would write out problem. The average price of an acre of U.S farmland was $1132 in 2001. In 2006, the price of an arce rose to

    asked by Cindy on February 22, 2011
  29. English

    When doing parenthetical citations for two works by the same author, not at the same time, how do you show the two novels. For example, citing a quote or idea from Of Mice and Men by Steinbeck, and then later another quote/idea from Grapes of Wrath. Would

    asked by Anonymous on September 13, 2008
  30. Algebra

    1. A sum of $15,000 was invested in three funds for 1 year. At the end of the year Fund A had earned 8% interest, Fund B had earned 11% interest and Fund C had earned 5% interest. A total of $1,230 was earned in interest. Twice as much money was initially

    asked by Neri on August 13, 2018
  31. Physics

    Which of the following statements is/are true about Gaussian surfaces? i. Gaussian surface is the name for a closed surfaces used when calculating flux in Gauss’ Law ii. A Gaussian surface can have any shape (as long as it is closed) iii. Like defining

    asked by mnop on May 1, 2018
  32. Finance

    Select a company and country that interests you. You have been asked to evaluate the country you selected as a potential market for your product(s)/service(s) and present your findings to other managers of the organization in a memo. In your memo, be sure

    asked by mee on July 24, 2010
  33. Internation business

    Select a company and country that interests you. You have been asked to evaluate the country you selected as a potential market for your product(s)/service(s) and present your findings to other managers of the organization in a memo. In your memo, be sure

    asked by Anonymous on November 15, 2008
  34. chemistry 2

    Titration of 50.0 mL of acetic acid reaches equivalence after delivery of 22.5mL of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH adition of 20.0

    asked by philip on April 14, 2014
  35. Geometric & Wave Optics Correction

    when an object is placed 10cm away from a lens; it is found that the formed is 6cm behind the object on the same side of the lens. Determine the focal lenght of the lens. solution 1/v + 1/u = 1/f u=10cm, v=6cm, f=? 6+10/60 = 1/f 70/60 = 1/f by cross

    asked by Matrix School 2 on July 22, 2009
  36. bio

    Q:My grandmother made kool-aid with 120 g of sugar (Sucrose) per liter. Assuming that the liqiud portion is water (1g/ml)- What percent sucrose solution was my grandmothers Kool-Aid? A: What i thought was that 120 g x1 mL/1g = 120 mL x100 = 12%. Is this

    asked by angad on February 27, 2010
  37. bio

    Q:My grandmother made kool-aid with 120 g of sugar (Sucrose) per liter. Assuming that the liqiud portion is water (1g/ml)- What percent sucrose solution was my grandmothers Kool-Aid? A: What i thought was that 120 g x1 mL/1g = 120 mL x100 = 12%. Is this

    asked by angad on February 27, 2010
  38. chemistry

    if you added sulfuric acid to calcium nitrate what products in addition to calcium sulphate would you get if any ? if you start with calcium nitrate mixed into H2SO4 (aq), wouldn't you get a solution of nitric acid? H2SO4 + Ca(NO3)2 >>> 2 HNO3(aq) +

    asked by walter on August 13, 2007
  39. chemistry

    Calculate the vapor pressure of a solution containing 28.7g of glycerin (C3H8O3) in 136mL of water at 30.0 ∘C. The vapor pressure of pure water at this temperature is 31.8 torr. Assume that glycerin is not volatile and dissolves molecularly (i.e., it is

    asked by Emily on November 23, 2014
  40. SCIENCE(PHYSICS)

    A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. My Solution:-1st hr. distance=40 multiplied by 0.2=8km 2nd hr.= 50 multiplied by 0.2=10km 3rd hr. =60 multiplied by 0.4=24 km

    asked by YASH on May 25, 2011
  41. algebra(difference of two squares)

    The positive difference between two consecutive odd numbers is 336. compute the larger of the two squares. But my solution was(n+1)^2-n^2=336. And. =2n+1=336. ,2n=335 where. I had n=335/2. Here igot stuck on solving the larger of the two squares. And

    asked by Rosy on January 3, 2017
  42. chemistry

    The mass percentage of chloride ion in a 29.00 sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.42 of 0.2998 silver nitrate solution to reach the equivalence point in the titration.

    asked by Cecelia on October 4, 2011
  43. Chemistry

    What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is 1.86°C/m. (Note that when Ca(NO3)2 dissolves in water Ca2+ and NO32- ions are produced).

    asked by Henry on May 25, 2012
  44. Chemistry

    Two moles of a nonelectrolyte solute are dissolved in 1 kg of an unknown solvent. The solution freezes at 7.8 degrees Celsius below its normal freezing point. What is the molal freezing point constant of the unknown solvent? What is your prediction for the

    asked by Alyssa on May 17, 2010
  45. CHEMISTRY

    chlorine is precipitated as silver chloride by reaction of silver nitrate with sodium chloride in an acid solution .how much sodium chloride in grams is required to produce 0.25g of silver chloride a)0.102g b)0.613 c)1.019 d)1.631g

    asked by HARLEY on October 5, 2017
  46. physics

    An object dropped from a cliff falls with a constant acceleration of 10m/s2. Find its speed 2s after it was dropped? Solution:Given ,accelaration =10m/s time=2s speed=? therfore,speed=distance travelled\total time taken s=10\2=5(ans) . is it ok.

    asked by Shalini on June 22, 2014
  47. College-Chemistry

    NaOH(s)+ H2SO4(aq)=Na2SO4(aq) + H2O(l) Consider the unbalanced equation above.A 0.900 g sample of impure NaOH was dissolved in water and required 37.0 mL of 0.145 M H2SO4 solution to react with the NaOH in the sample. What was the mass percent of NaOH in

    asked by Tiffany on February 26, 2010
  48. Probability

    A binary communication system is used to send one of two messages: (i) message A is sent with probability 2/3, and consists of an infinite sequence of zeroes, (ii) message B is sent with probability 1/3, and consists of an infinite sequence of ones. The

    asked by qwerty on March 7, 2015
  49. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked by Dexter on June 17, 2011
  50. economics

    18. (Shifts in the PPF) Terrorist attacks foster instability and may affect productivity over the short and long term. Do you think the September 11, 2001, terrorist attacks on the World Trade Center and the Pentagon affected short- or long term

    asked by Gary on August 23, 2010
  51. Math

    The students in Mrs. Garcia's class will sell magazine subscriptions to raise money for the new playground equipment. The statistics from the magazine company show that one out of every 5 people asked will buy a subscription. Based on the company's

    asked by Francine on April 26, 2018
  52. Chemistry

    Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq)

    asked by Dexter on June 17, 2011
  53. math

    You spin the spinner twice. draw a tree diagram and list sample spaces to show the possible outcomes. From that answer questions 1,2 and 3. The spinner is 4 equal parts for a, b, c ,d I know the tree diagram- you Have a,b,c,d, and from each of those

    asked by B6 on May 10, 2013
  54. maths

    The distance between 2 town x and y, is 50km.alan drive from x to y at an average speed of vkm/ h. Write down an expression,in term of v,for the time in hour, that he took to complete the journey from x to y. Write down an expression in term of v,for the

    asked by kennard on February 15, 2013
  55. stat

    a full scholarship to any student who scores in the top 4% of students on the SMRT standardized exam. SMRT scores have a mean of 260 and a standard deviation of 22. What score does a student need to attain in order to receive the scholarship? this is how I

    asked by Barb on October 20, 2014
  56. math probabilty- please help

    You spin the spinner twice. draw a tree diagram and list sample spaces to show the possible outcomes. From that answer questions 1,2 and 3. The spinner is 4 equal parts for a, b, c ,d I know the tree diagram- you Have a,b,c,d, and from each of those

    asked by B6 on May 11, 2013
  57. maths natural log

    In the beginning, only some white aigrettes live in a swamp. On a certain day, a group of black aigrettes migrate to the swamp. The population of the white aigrettes (W) and the black aigrettes (b)after t months are given by W= 1100e^(-0.08t) and b= 800-

    asked by jasontt on March 29, 2014
  58. Physics

    A common demonstration, illustrated below, consists of a ball resting at one end of a board of length and elevated at an angle è. A light cup is attached to the board at r so that it will catch the ball when the support stick is suddenly removed. (a) Show

    asked by Ciel on November 18, 2009
  59. maths

    for this quadratic equation: y2-4y-16 = 0 which two options are correct solutions, rounded to three decimal places? 1) -4.483 2) -3.243 3)-2.472 4) -1.472 5) -0.536 6) 5.243 7) 6.472 8) 12.443 Use the quadratic equation, we will be happy to critique your

    asked by angel on April 15, 2007
  60. science

    what happens to the particles in a liquid as the temperature frops? I don't know what happens as the temperature frops; however, if it DROPS :-), and we are talking about a pure liquid and not a solution, then the molecules become less and less energetic

    asked by Paige on September 30, 2006
  61. Math

    Lenlen cut a rectangular block of cheese into cubes with an edge of 3cm each. The base area of the block is 36 cm squared. If the block is 6 cm high, how many cubes of cheese did Lenlen get in all? That is my math hw It needs an equation solution and

    asked by Lol im a 10 y.o. Girl on January 18, 2016
  62. Gen Chem II

    Vitamin K is involved in normal blood clotting. When 1.36 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 4.56 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

    asked by Nefret on February 10, 2013
  63. Chemistry

    Vitamin K is involved in normal blood clotting. When 2.32 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 7.78 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

    asked by Abdul on December 7, 2014
  64. Chemistry

    Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?

    asked by Felicia on February 9, 2013
  65. Pacific Union College

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.5 g of biphenyl in 28.8 g of benzene?

    asked by Nick on February 24, 2013
  66. college chem

    Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?

    asked by Zachary on February 9, 2013
  67. Chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.3 g of biphenyl in 34.0 g of benzene?

    asked by Max on February 25, 2013
  68. Chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 10.7 g of biphenyl in 33.9 g of benzene?

    asked by Sarah on February 18, 2012
  69. chemistry

    The Vapor pressures of pure propyl alcohol and isopropyl alcohol are 21.0 mmHg and 45.2 mmHg, respectively, at 25 (degrees)C. Calculate the partial pressure of isopropyl alcohol above a solution in which the mole fraction of propyl alchol is 0.250.

    asked by jimbo on June 27, 2010
  70. Chemistry

    Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

    asked by Shardai on October 16, 2013
  71. Chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 19.6 g of biphenyl in 25.1 g of benzene?

    asked by Gabrielle on January 29, 2013
  72. chemistry HELP

    a flask containing 50ml of 0.128M sodium acetate is titrated with 0.138M nitric acid. Calculate the initial ph of the acetate solution and calculate the ph after the addition of 24.9ml of nitric acid. pKa for acetate 4.757

    asked by amy on April 27, 2017
  73. chemistry

    the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.

    asked by Confused on October 6, 2010
  74. MATH

    I have 2 questions the first I have narrowed down to 2 possible solutions the second has 3. What is the solution to log sub 5 (2x+3)=2 a)13/2 or b)14? The next problem f(x)= log sub 5 x what is the value of 1/25? a)square root of 2 b)-1/2 or c)1/2? Help is

    asked by Anonymous on January 16, 2007
  75. Math

    A rectangular flower vase whose base is 20 cm long and 15 cm wide is half-filled with water. When Michelle placed some stones in the vase, the water rises from 5 cm to 7 cm. What is the volume of the stones that Michelle put in the vase? P.S. Write your

    asked by Ceena on January 11, 2016
  76. chemistry

    A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?

    asked by Ethan on September 3, 2010
  77. Chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 18.9 g of biphenyl in 26.4 g of benzene?

    asked by Josh on February 22, 2012
  78. Science

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 15.2 g of biphenyl in 29.5 g of benzene?

    asked by Maria on October 9, 2012
  79. Chemistry

    Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 °C. Calculate the molar mass of vitamin K. Kf value is 37.8 and the normal freezing point is

    asked by Shardai on October 17, 2013
  80. chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 19.9 g of biphenyl in 34.3 g of benzene?

    asked by Brianna on January 21, 2013
  81. Biochemistry

    the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.

    asked by nikki on October 5, 2010
  82. chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 11.1 g of biphenyl in 29.1 g of benzene?

    asked by Anonymous on February 22, 2013
  83. AP Chemistry

    The answer is 50.0 torr and I got 46.0 torr but idk what I did wrong. Find the vapor pressure of a solution of 164 g of C3H8O3 and 338 mL of water at 39.8 degrees Celsius. Water's VP at 39.8 degrees celsius is 54.74 torr; it's density is 0.992 g/mL.

    asked by Ashley on January 25, 2011
  84. Chem 2

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 12.5 g of biphenyl in 27.9 g of benzene?

    asked by Payie on July 14, 2012
  85. Math - Two-Step Inequalities - Please Help

    I need help with this one, please. Which of the following is in the solution set of the inequality –3 > –3t + 6? A. -1/3 B. 1/3 C. 4 D. -4 I did a Pre-Test for my lesson, and it says I got this one wrong. However, it doesn't say which one I picked. For

    asked by Brady on December 19, 2014
  86. Chemistry AP

    Alright, this time, I know I have not mistyped my answer. Find the initial concentration of the weak acid or base in an aqueous solution of hydrazine (NH2NH2) with a pH of 10.16. Kb = 1.70 ×10−6 Answer in M I've tried going from 10^-pH then using that

    asked by Ethan on February 9, 2015
  87. chemistry

    The solubility of silver chloride can be increased by dissolving it in a solution containing ammonia. AgCl (s) Ag+ (aq) + Cl- (aq) K1 = 1.6 x 10-10 Ag+ (aq) + 2NH3 (aq) Ag(NH3)2+ (aq) K2 = 1.5 x 107 What is the value of the equilibrium constant for the

    asked by ken on July 21, 2012
  88. Chemistry

    Titration of 50.0 ml of acetic acid reaches equivalence after delivery of 22.5 ml of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH after addition

    asked by Sam on April 14, 2014
  89. College Chemistry II

    What is the solubility of ZnCO3 at 25C in a buffer solution with a pH of 10.21? ZnCO3 Zn++ + CO3 – - CO3-- + H2O ----> HCO3- + OH- pOH = 14 – 10.21 = 3.79 [OH-] = 1.62x10^-4 M = [CO3--] = [Zn++] Ksp = [Zn++][CO3-] = (1.62x10^-4)( 1.62x10^-4) =

    asked by Monica on August 10, 2014
  90. Chemistry

    A solution of methanol and water has a vapour pressure of 213 Torr. What would you predict as the mole fractions of each component, assuming ideal behaviour? The vapour pressures of methanol and water are 256 Torr and 55.3 Torr, respectively

    asked by Matt on June 4, 2015
  91. accounting

    Timberly Construction negotiates a lump-sum purchase of several assets from a company that is going out of business. The purchase is completed on January 1, 2013, at a total cash price of $820,000 for a building, land, land improvements, and four vehicles.

    asked by Jamie on August 8, 2014
  92. Texas State History

    I need help answering these questions. 6. Propose a solution to a problem faced by Texans on the home front as a result of the Union blockade. 8. How did John Bell Hood's action affect Texas’ history over the next four years? Give details to support your

    asked by Pumkin-head on December 7, 2018
  93. History

    My teacher wanted me to make an essay about slavery.. This is my essay: At the time of the American Revolution, the split between North and South over the issue of slavery was apparent but not great enough to prevent the states from uniting as one nation.

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  94. english CITING

    hey i tried to do the following hope there correct this time my work is the last the upper from my work is the original one that i need to correct Source C: An article in the Chicago Tribune entitled “Happiness is Contagious, New Study Finds.” It was

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  95. Math

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  96. algebra

    I need help on multiplying and dividing functions. I've seen videos and read and read examples but I still don't get it. I did the last problem which looked like an example I had read but I still don't know if I did it right: f(x)=2x+1 g(x)=3X+2 F(3)/g(2)=

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  97. algebra 2

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  98. Algebra

    Solve the problem. A salesperson gets a commission of $600 for the first $10,000 of sales, and then $300 for each additional $10,000 or partial of sales. Let S(x) represent the commission on x dollars of sales. Find the value of S(45,000)

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  99. Algebra II

    Solve the following word problem using a linear equation: John has been recently looking at his phone bill. It costs $2.65 for a 4 minute call and $4.75 for a 10 minute call. How much will it cost John for a 30 minute call?

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  100. chemistry

    The radius of an atom is about 10,000 times as large as its nucleus. If the atom were enlarged such that the radius of its nucleus was 1 inch, what would be the radius of the atom in meters? I need the formula to follow so that I can solve this problem.

    asked by george on December 1, 2011

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