1. physical science

    How do I calculate this problem? How much water vapor is produced for each amount of propane burned. Mass of c3h8 reacted 44, mass of O2 reacted 160, mass of CO2 produces 132?

    asked by Jackie on September 25, 2015
  2. College Chemistry

    Oxygen has a Henry’s law constant of 1.3*10^-3 mol/kg*bar at 25 °C when dissolving in water. If the total pressure of gas ( gas plus water vapor) over water is 1.00 bar, what is the concentration of O2 in the water in grams per milliliter? (The vapor

    asked by Pablo on February 3, 2016
  3. Chemistry

    Why does a compound with a high vapor pressure boil at a lower temperature than a compound with a lower vapor pressure?

    asked by Anonymous on March 14, 2016
  4. Chem

    A gas has a pressure of 1.2 atm with a volume of 50.0 L and a temperature of 25 C, If the pressure is changed to 2.0 atm while the temperature is increased to 50 C, what is the new volume?

    asked by Chrissiee on April 5, 2016
  5. Algebra

    At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon?

    asked by Chelsey on February 26, 2014
  6. Chemistry

    At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon?

    asked by Chelsey on February 26, 2014
  7. Ap Physics (Fluids and Pressure_

    a) What is the gauge pressure of water at a depth of 38.7 m? kPa b) What is the actual pressure of water at this depth? kPa what formulas do i use and how do i do this?

    asked by Jessica on November 12, 2009
  8. chemistry

    At a pressure of 1.7 atm a balloon has a volume of 4.98 L . If the pressure is decreased to 1.0 atm (at constant temperature) what is the new volume of the balloon?

    asked by Christine on December 14, 2011
  9. chemistry

    what is the pH if you mix 250ml of 3M HCl with 500ml of 1.5M CN-? i know that: HCl+CN- ---> HCN+Cl- 250ml converts to .75 moles and 500ml also converts to .75 moles when using the 3M and the 1.5M. Ka=X^2/m-x x/1000=.015/750 .02 CN- left.

    asked by GINA on March 11, 2011
  10. chemistry

    Is the number of moles of an element reacted equal to the number of moles of an element produced? -Let's say for example, 5g of copper. So the molar mass of copper (according to my textbook in which I need to use those numbers) is 63.55g/mol So 5g /

    asked by J on November 5, 2014
  11. Chemistry

    So my chem professor had a slide with a question that follows: If you combine 100 ml of 0.10 M HCl and 100 ml of 0.10 M NaOH, and find that the temperature goes up 0.67 degrees K  What is ΔH° for the reac/on: OH(aq)- + H+(aq)->H2O(l)(c H2O= 4.18 J/°C

    asked by Angely R. on March 26, 2014
  12. math

    The Mustangs and the Bruins play in a basketball tournament. The team that first wins three games wins the tournament. Assuming ties are not possible, find the number of possible ways in which the tournament can occur. I feel like there is not enough

    asked by Phillip on February 25, 2010
  13. Physical Science

    1. In which of the following units is acceleration expressed? *A. Newtons B. Foot-pounds C. Kilograms D. Meters per second squared 2. A stone falls from a ledge and takes 16 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall

    asked by Lizzy on September 26, 2011
  14. Math

    7) A population of ants is growing at a rate of 8% a year. If there are 160 ants in the initial population, find the number of ants after 6 years.

    asked by Sherhaida malali on July 13, 2017
  15. pre-alg

    What is the scale that you will use for your scale drawing? I'm not understanding the question? is it asking what number i will use? or is it asking what type of graph type deal I will use? (My scale was 115 x 160)

    asked by Pretty Reckless on November 25, 2013
  16. maths

    an aircraft flies from point A to point B 400km on a course 040*T. It then flies on a course 160*T from B to a point C 500km from A. Calculate: a) the distance BC b) the bearing of C from A

    asked by Cindy on October 6, 2011
  17. chemistry

    When 85.0 g of CH4 are mixed with 160. g of O2 the limiting reactant is __________. CH4 + 2O2 ¨ CO2 + 2H2O A) CH4 B) O2 C) CO2 D) H2O

    asked by Janaiby on July 13, 2013
  18. Ap Chemistry

    at 25 degrees Cliquid A has a vapor pressure of 100.0 torr, while liquid B has a vapor pressure of 200.0 torr. The heat of vaporization of liquid A is 32.0 kJ/mol and that of liquid b is 18.0 kJ/mol. At what celsius temperature will A and B have the same

    asked by John on January 23, 2008
  19. chemistry

    A 2.85-g sample containing only MgO and CuO is placed in a 3.00-L container. The container is filled with CO2 to a pressure of 740. torr at 20. degree C. After the reaction has gone to completion, the pressure inside the flask is 390. torr at 20. degree C.

    asked by thomas richards on October 27, 2010
  20. chemistry

    A sample of a saturated hydrocarbon is placed in a 1.0L vessel at 107oC. The pressure of the sample at these conditions is .40 atm. A stoichiometrically equivalent amount of oxygen is added to the vessel and the mixture is combusted. Following combustion,

    asked by bill on May 22, 2012
  21. Chemistry

    Consider two flasks. What are the final partial pressure of H2 and N2 after the stopcock between the two flasks is opened? Assume the final volume is 3.00 L. What is the total pressure in torr? Flask 1: 2.00 L H2, 475 torr Flask 2: 1.00 L N2, 0.200 atm

    asked by Victor on April 6, 2017
  22. dynamics of rigid bodies

    1. An elevator weighing 15 kN starts from rest and acquires an upward velocity of 3 m/sec. in a distance of 6 m. If the acceleration is constant, what is the tension in the cable? 2. A man weighing 70 kg is in an elevator moving upward with an acceleration

    asked by von on July 7, 2015
  23. chemistry

    The vapor pressure of liquid chloroform, CHCl3, is 100. mm Hg at 283 K. A 0.198 g sample of liquid CHCl3 is placed in a closed, evacuated 400. mL container at a temperature of 283 K. Assuming that the temperature remains constant, will all of the liquid

    asked by ryan on November 11, 2014
  24. Chemistry

    Your space ship has docked at a space station above Mars. The temperature inside the space station is 24oC at a pressure of 745mmHg. A balloon with a volume of 425mL drifts into the airlock where the temperature is -95oC and the pressure is 0.115 atm. What

    asked by Marissa on November 14, 2013
  25. Calculus

    A fully plane has a constant acceleration while moving down a runaway. the plane requires .7 mile of runaway and a speed of 160 miles per hour in order to lift off. what is the planes accelearation? i need the formula cause the one i have doesnt work cause

    asked by Nancy on December 8, 2009
  26. math

    Following are the lengths in yards of the nine holes of the University Golf Course: 480,460,450,380,360,350,330,180,160 Find each of the following measures with respect to the lengths of the holes: d. Standard deviation 36.07263

    asked by is this right!!! on June 16, 2009
  27. physics HELP

    A projectile is fired with an initial speed of 1000 m/s at an angle of 37 degrees above the horizontal. If air resistance is neglected, the horizontal component of the projectile's velocity after 20 s is approximately A) 600 m/s B) 800 m/s C) 640 m/s D) 40

    asked by anonymous on November 30, 2010
  28. Physics

    A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m? Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got too. If

    asked by Yoyo on August 7, 2015
  29. College Physics

    An x-ray photon collides head-on with an electron and is scattered directly back at 160◦ to its original direction. What is the shift in the wavelength of the incident x-ray? do i need to figure out the "compton shift" in order to solve..can someone

    asked by Angie on April 13, 2010
  30. Chemistry

    Gasoline is a mixture of hydrocarbons, a major component of which is octane,CH3CH2CH2CH2CH2CH2CH2CH3. Octane has a vapor pressure of 13.95 torr at 25 degrees celcius and a vapor pressure of 144.78 torr at 75 degrees celcius. Use these data and the equation

    asked by Jeremy on January 25, 2012
  31. CHEM QUICK HELP

    Which of the following are correct statements? (Could be as many as 4) 1. Standard pressure is 101.3 atmospheres 2. One mole of gas contains 22.4 representative particles 3. One mole of gas always occupies 22.4 liters regardless of other conditions 4.

    asked by emily on April 11, 2013
  32. physics

    a tank of ideal gas is sealed off at 20 degrees C and 1.00 atm pressure. What will be the pressure (in kPa and mmHg) in the tank if the gas temperature is decreased to -35degrees C ? the book answer is 82kPa = 6.2 x10^2 mmHg can you help me figure out how

    asked by phyllis on March 6, 2010
  33. CHEMISTRY

    if a pure liquid in a sealed container is in equilibrium with its own vapor, the dependence of the vapor pressure on the temperature and the heat of vaporization is governed by the Clausius-Clapeyron equation. what is the heat of vaporization if the vapor

    asked by tre on December 10, 2012
  34. Algebra

    Tire pressure is directly proportional to temp on a temp scale where zero degrees is absolute zero. given that temp in degrees celcius and degrees Fahrenheit are related by the formula F=9/5C +32 and absolute zero is -273.15C, by what % does tire pressure

    asked by Grace on October 18, 2016
  35. statistics

    Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue $320 John $300 Mike $220 Betty$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

    asked by Mike... on April 24, 2011
  36. arithmetic

    Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue $320 John $300 Mike $220 Betty$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

    asked by MIKE. on April 26, 2011
  37. physics

    The puck in the figure below has a mass of 0.160 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 60.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work

    asked by anonymous on December 16, 2012
  38. Math

    Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue $320 John $300 Mike $220 Betty$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

    asked by Mike... on April 24, 2011
  39. Dr.Bob222

    this is all my work so far on the limiting reagent problem I asked about yesterday about Calcium nitrate and ammonium fluoride.... 28.42g/164.1= .17318 mol Ca(NO3)2 29.6g/37.042=.79909 mol (NH4)F (1mol Ca(NO3)2 /.17318) x (2mol (NH4)F/x)=.34636 (2 mol

    asked by Brittany on October 27, 2009
  40. Chemistry

    Using your experimental data, calculate E0cell. Standard voltaic cells contain 1M solutions, but we used 0.10M solutions in all of our half cells. Use the Nernst equation to calculate the standard cell potential (E0cell) from your measured Ecell and Qrxn.

    asked by Chloe on May 14, 2013
  41. fire science

    if the pressure of a tire is 32 psi at room temperature then the pressure increases to 36 in the tire what is the temperature of the tire

    asked by pat on November 11, 2018
  42. Math

    One positive number is one-fifth of another number. The difference between the two numbers is 160, find the numbers.

    asked by Bsal on September 5, 2016
  43. Chemistry

    Exhibit 8-1 For the following questions, consider the equation below. Zinc will react with a solution of hydrochloric acid to produce hydrogen gas: Zn(s) + 2 HCl(aq) ® ZnCl2(s) + H2(g) Refer to Exhibit 8-1. How many moles of hydrochloric acid react with

    asked by nan on December 14, 2011
  44. Chemistry

    I have 0.009 moles of CaCO3 and I needed to find how many moles of CO3 are in the CaCO3. I am just making sure I am doing this correctly. 0.009 mol CaCO3 x 60.01/100.09= 0.54g CO3 0.54g CO3/ 100.09g CaCO3 = 0.005 mol CO3

    asked by Matt on November 2, 2012
  45. chem

    If 4.75 mL of cycohexene is reacted with 7.04 g of bromine, which is the limiting reagent? What is the theoretical yield of product? Alkenes like cyclohexene undergo addition reactions with bromine to produce dibromoalkanes. So, write and balance the

    asked by Nisar on September 4, 2005
  46. math

    Deandre rented a truck for one day. There was a base fee of 16.99 , and there was an additional charge of 78 cents for each mile driven. Deandre had to pay 160.51 when he returned the truck. For how many miles did he drive the truck?

    asked by janae on February 12, 2013
  47. Chemistry

    If a gas has a pressure of 3.0 atm at 12.8°C, what is its pressure (atm) at 25.9°C?

    asked by Linzy on March 25, 2013
  48. chem

    an empty container has a mass of 658.57g. It has a mass of 659.45g after it has been filled with nitrogen gas at a pressure of 790 torr and a temperature of 15 deg C. When the container is evacuated and refilled with a certain element at a pressure of 745

    asked by alex on May 10, 2011
  49. Chemistry

    A container is filled with CO2(g) and heated to 1000K. The gas pressure at this temperature is 0.50 atm. Graphite (C) is then added to the container and some of the CO2 is converted to CO according to the reaction below. The final equilibrium total gas

    asked by Nat on July 24, 2013
  50. Chemistry (urgent)

    The gold foil Rutherford used in his scattering experiment had a thickness of approximately 4×10^−3 mm. If a single gold atom has a diameter of 2.9 x10^-8cm , how many atoms thick was Rutherford's foil? Express your answer using one significant figure.

    asked by Bella on September 13, 2011
  51. physics

    In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? Ok I know I have the temputure of

    asked by Tim on April 27, 2008
  52. chemistry

    1. If a gaseous sample contains 73% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)? 2. Calculate the vapor pressure of a solution of 0.60 mol of cholesterol in 4.5 mol of toluene at 32°C.

    asked by Ashley on January 31, 2011
  53. Chem

    A tank car containing concentrated HCL (molarity 12.1) derails and spills exactly 1500 L of acid. Solid potassium hydroxide is required ot neutralize the spill. (a) Write a balanced chemical equation. HCl + KOH -> kCl + H2O (b) What is the molar ratio

    asked by Lena on July 6, 2009
  54. chemistry

    Which of the following is NOT true for solutes and solvents? A. At least one solvent must be dissolved in a solute to make a solution. B. Solute concentration can be measured in terms of solute moles / solution volume or solute moles / solvent mass. C. A

    asked by Dino on April 4, 2008
  55. Chemistry

    Can someone check my answer and let me know me if the are right or wrong. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H₂O at 20°C.) * 34 g 204 g ***** 2040 g 3. (1 point) If the

    asked by Lydia on March 13, 2017
  56. physics

    What is the total force on the bottom of a swimming pool 22.0 m by 8.9 m whose uniform depth is 1.6 m? What is the absolute pressure on the bottom of a swimming pool? What will be the pressure against the side of the pool near the bottom?

    asked by Cory on November 16, 2010
  57. 7th Grade Help

    If the temperature increases in a sample of gas at constant volume, then its a. volume increases b. pressure decreases c. pressure increases d. volume decreases Plz help me, I don't know it.

    asked by completeidiot on September 8, 2012
  58. Chemistry 12

    Hi, I did the acid-base titration lab with HCl and 0.5M NaOH. I need to calculate the moles of NaOH from molarity of NaOH and the average volume used. My English isn't good but is it asking me to find the moles of NaOH using the molarity of NaOH and the

    asked by Kim on June 2, 2015
  59. Org. Chem.

    A natural product (MW=150) distills with steam at a boiling temperature of 99 degrees Celsius at atmospheric pressure. The vapor pressure of water at 99 degrees Celsius is 733 mm Hg. A) Calculate the weight of the natural product that codistills with each

    asked by CMM on November 10, 2009
  60. Thermophysic and electromagnetisme

    A tank of volume V = 2.0 l will burst if the pressure exceeds 100 atm. The tank is filled with 6.0 mole of an ideal gas at a temperature of 23 ° C. We heat the tank. a)What is the initial pressure in the tank? b)At what temperature we can heat the tank

    asked by Zhenya on October 24, 2015
  61. science

    Please help!! Methylamine has a vapor pressure of 344 torr at -25∘C and a boiling point of -6.4∘C . Find ΔHvap for methylamine. I know that ln(P1/P2)=(ΔHvap/R)(1/T2-1/T1) but it doesn't indicate whether the boiling point is the "normal boiling

    asked by caleigh on December 12, 2016
  62. Chemistry

    Diethyl ether is a volatile organic compound. the vapor pressure of diethyl ether is 401 mm Hg at 18 degrees celsius and the change in H vapor = 26.0 kJ/mol. Calculate the vappor pressure of diethyl ether at 25 degrees C.

    asked by Ania on November 6, 2012
  63. algebra pleeeease help

    Which solid has one base that is a triangle and three lateral surfaces that are triangles? (1 point) triangular pyramid triangular prism rectangular prism rectangular pyramid 2. Sarah needs to cover the lateral area and the base on top of the cylinder. A

    asked by laila on March 10, 2017
  64. physics

    Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known spot in the Earth's oceans, at 10.922 km below sea level. Taking density of seawater at atmospheric pressure (p0 = 101.3 kPa) to be 1024 kg/m3 and its bulk modulus to be B(p)

    asked by Anonymous on April 16, 2011
  65. chemistry

    an ideal gas in a closed inflexible container has a pressure of 6 atm and a temperature of 27 degree celsius . What will be the new pressure of the gas of temperature is decreased to -73 degree celsius? a) 2 atm b) 3 atm c) 4atm d) 8atm e) 9atm plz teach

    asked by star on May 28, 2012
  66. chemistry

    Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by monitoring the partial pressure of azomethane, in torr. Time (min) 0, 15, 30, 48, 75 Pressure(torr)36.2, 30, 24.9,19.3, 13.1

    asked by Jazmin on March 15, 2011
  67. chemistry

    an ideal gas in a closed inflexible container has a pressure of 6 atm and a temperature of 27 degree celsius . What will be the new pressure of the gas of temperature is decreased to -73 degree celsius? a) 2 atm b) 3 atm c) 4atm d) 8atm e) 9atm plz teach

    asked by star on May 28, 2012
  68. Chemistry

    a bicycle is filled with air to a pressure of 6.80atm and a temperature of 19 degrees celsus. Riding the ike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius. The volume of the tire increases by 4.0%. What is the new

    asked by Unathi on May 18, 2015
  69. College Chemistry

    We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of NaOH(aq) to use per titration is 15mL. From this molarity and volume, the moles of NaOH can be calculated. Since the unknown acid

    asked by Alex on October 15, 2012
  70. chemistry

    A glucose solution contains 55.8g of glucose (C6H12O6) in 455g of water. Calculate the freezing poing and boiling point of the solution. (Assume a density of 1.00 g/ml for water. This what I did, I got moles of C6H12O6, 0.89 moles C6H12O6 then I got the

    asked by Monique on November 4, 2011
  71. chemistry

    Suppose that the reaction of Fe3+ and SCN- produces Fe(SCN)2 (+). 5.00mL of 2.0mM Fe3+ is mixed with 5.00 mL of 2.0mM SCN-. The student finds the equilibrium concentrations of Fe(SCN)2(+) to be 0.3mM. 1.) What is the initial number of moles of each species

    asked by paula on February 23, 2015
  72. math-probability

    The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?

    asked by GG on November 30, 2009
  73. Math

    A basketball team won 10 of its first 20 games. If then won its next 5 games. What fractional part of its total number of games did it win?

    asked by Mohammed on July 10, 2013
  74. math

    The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?

    asked by Kylie Castaneda on November 18, 2009
  75. Math

    A basketball team won 10 of its first 20 games. If then won its next 5 games. What fractional part of its total number of games did it win?

    asked by Mohammed on July 11, 2013
  76. math

    The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?

    asked by CLA on November 18, 2009
  77. math

    Over a period of 5 games a basketball team made exactly 44% of their shots. the number of shots taken was more than 310 and less than 350. How many shots were made?

    asked by Bob on December 7, 2012
  78. Physics

    A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend in the bottom 15.4 cm of the jump? I need someone to check my work. I got about 3.797 as the inital velocity. I plugged this into

    asked by Lindsay on October 10, 2007
  79. PE

    Kobe Bryant is a very famous basketball player who helped his team win many national champion ships. When people use him to advertise their line of athletic wear, what type of advertising are they using? Band wagon emotional appeal price appeal testimonial

    asked by Kat on February 24, 2017
  80. Math

    The Basketball Birthday Batter Package at a Minor league ballpark costs $192. The Package includes tickets, drinks, and cake for A group of 16 children. Write an equation To find the cost per child. 16c = $192

    asked by NEED HELP ASAP on October 20, 2014
  81. physics

    A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to

    asked by emily on October 8, 2017
  82. Algebra

    The Basketball Birthday Batter Package at a Minor league ballpark costs $192. The Package includes tickets, drinks, and cake for A group of 16 children. Write an equation To find the cost per child. 16c = $192

    asked by Mike on October 20, 2014
  83. physics

    In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.1 m/s at an angle of 15.0° below the horizontal. It is released 0.82 m above the floor. What horizontal distance does the ball cover before

    asked by HELP on October 12, 2012
  84. MATH HELP ASAP

    3. The Step-And-Leaf Plot below could NOT represent which of the following? 1 | 1 2 2 7 7 2 | 1 4 4 7 3 | 3 5 6 8 9 Ket: 3 | 5 means 3.5 A. The average number inches rain in june B. The height of plant seedlings, in inches C. The weight of phonebooks, in

    asked by Anonymous on March 17, 2015
  85. math

    the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the following is the correct way to set up the problem to

    asked by krysta on March 1, 2012
  86. Algebra

    To keep his basketball team hydrated, Daniel mixes a powdered sports drink with cold water. For best taste the mix should be 96% water. If Danial has used 16 scoops of powder and added two quarts of water, how many gallons of water should he add, given

    asked by James on October 3, 2012
  87. CHE1

    Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2(l) → 2H2O(l) + O2(g) ΔH = -196 kJ Calculate the value of q (kJ) in this exothermic reaction when 4.60 g of hydrogen peroxide decomposes at constant

    asked by Karla on July 9, 2017
  88. chemistry

    A sample of neon gas used in a neon sign occupies a volume of 3.90 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 783 torr.

    asked by Anonymous on April 24, 2012
  89. Chemistry

    A sample of chlorine gas at a pressure of 420 mm Hg and in a volume of 3.50L was heated from 18.0 degrees celsius to 45 degrees celsius after being transferred to a container of volume 2.35L. The pressure in this new container should be about? Would I use

    asked by Hannah on January 14, 2012
  90. Chem

    . State whether each of the following samples of matter is a gas. If there is not enough information for you to decide, write "insufficient information." (a) A material is in a steel tank at 100 atm pressure. When the tank is opened to the atmosphere, the

    asked by Luis on March 30, 2007
  91. Chemistry

    a) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 degrees Celcius, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 13.8 g of biphenyl in 32 g

    asked by Eric on August 29, 2015
  92. math

    Weights of women are normally distributed with mean 143 pounds and standard deviation 29 pounds. If 36 women are randomly selected, what is the probability that their mean weight is between 120 and 160 pounds? Round your answer to two decimal places.

    asked by anon on March 31, 2016
  93. College Physics

    A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion

    asked by Taylor on April 8, 2012
  94. physics

    In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (−78.5°C ) and in boiling pentane (36.1°C). The separate pressures are 0.896 atm and 1.433 atm. Hint: Use the linear relationship P = A + BT, where A and B are

    asked by shawn on December 13, 2014
  95. chem

    The reaction AB(aq)->A(g)+ B(g)is second order in AB and has a rate constant of 0.0282 M^{-1} s^{-1} at 25 Celsius. A reaction vessel initially contains 250 mL of 0.105 M AB which is allowed to react to form the gaseous product. The product is collected

    asked by Yuni on January 13, 2012
  96. Chemistry

    1. Reactions follow the law of conservation mass.- T? 3. In a chemical equation, the material to the left of the arrow equals the material on the right.- T 8. In a single replacement reaction, sodium (Na) doesn't replace hydrogen.- F? 16. Increased

    asked by mysterychicken on October 26, 2010
  97. Chemistry

    Carbon monoxide and molecular oxygen react to form carbon dioxide. A 49.0 L reactor at 200°C is charged with 1.14 atm of CO. The gas is then pressurized with O2 to give a total pressure of 3.54 atm. The reactor is sealed, heated to 350°C to drive the

    asked by Derek F. on December 18, 2014
  98. MAth

    A sphere has a surface area of 28.26 in2. Find the diameter in inches, of the sphere. Use PI Question 2 What is the surface area, in square inches, of a sphere with radius 3.5 in.? Use Pi and round your answer to the nearest hundredth, if necessary.

    asked by Jessica on July 8, 2012
  99. PHYSICS

    A cylinder with a moveable piston holds 2.40 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 141 kPa. What is the final volume of the gas? I don't know where to begin. I tried

    asked by Zack on June 21, 2007
  100. chem

    One atmospheric pressure is that which will support a column of mercury 760.0 mm high. Show that 1 atm equals 1.013 x 10^5 N/m^2. Take the density of Hg to be 13.60 g/cm^3 and the gravitational constant to be 9.80 m/s^2. (You may find unit analysis

    asked by Chris on January 6, 2007