osmotic pressure chemistry

10,971 results, page 93
  1. chemistry HELP!!

    Reaction Rate = -(1/2) [d(H2O2)/dt] = [d(O2)/ dt] Using 25 mL of a 0.2 M hydrogen peroxide solution, the following results are obtained from the equation above: 8.62 mL of gas is collected in 120 seconds. (Assume 760 Torr = 1 atm) Room temperature is 25

    asked by Aaron on September 21, 2015
  2. solids and structural mechanics

    A thin-walled steel cylinder of 1 m diameter is subjected to an internal pressure of 1.5 MPa. Using a safety factor of 1.5 and a yield stress in simple tension of 250 MPa, calculate the wall thickness on the basis of Tresca’s, Von Mises and Rankine’s

    asked by marvin on August 2, 2018
  3. Chemistry

    Determine the atomic weight of X in the following compounds a)8g XH4 occupy 44.8L volume at 237C and 380 mmHg pressure b)1.92g of X3 occupis a volume of 574 ml at 77C and 2 atm c)A O.326 gram of gas,C3X4 has a volume of 250 ml at100C and 76 cmHg d)A 3.12

    asked by faisal on March 11, 2012
  4. Chem

    Please help are these right? A 2.3 mole sample of nitrogen (N2), has a volume of 50.0 L and a pressure of 630 mmHg. What is the temperature of the gas? 41.5 C which I converted to Kelvin and got 231.5K Calculate the molarity (M) of the following solutions:

    asked by Jada on November 29, 2010
  5. chemistry

    at standard pressure, which has the highest average kinetic energy? a)H20(g) at 110 oC b)H20(s) at -10 oC c)H20(l) at 25 oC d)H20(l)(arrows going opposite directions)H20(g) at 70 oC e)H20(s)( arrows going opposite direction)H20(l) at 0 oC

    asked by Anonymous on September 26, 2011
  6. Physics

    A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is

    asked by Rachel. on August 5, 2013
  7. Physics

    A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is

    asked by Rachel. on August 5, 2013
  8. Physical Science

    Hello! Thanks for checking my question out! ____ 5. If the volume of a cylinder is reduced from 8.0 liters to 4.0 liters, the pressure of the gas in the cylinder will change from 70 kilopascals to (1 point) a) 35 kilopascals. b) 105 kilopascals. c) 140

    asked by Da Fash on September 21, 2017
  9. Chemistry

    Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa.

    asked by Caitlin on November 20, 2012
  10. chem

    a gas mixture is comprised of 32% oxygen and the rest is nitrogen. If the scuba tank is pressurized to a total pressure of 132 atm what are the partial pressures of the oxygen and nitrogen inside the tank? I'm having trouble understanding how to find

    asked by Anna on May 30, 2016
  11. chemistry

    A chemist weighed out 5.31 g of a mixture containing unknown amounts of BaO(s) and CaO(s) and placed the sample in a 1.50 L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of

    asked by Anonymous on November 7, 2010
  12. Chemistry

    I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow. Ammonia is formed by reacting nitrogen and hydrogen gases. How many

    asked by Help please on April 6, 2010
  13. Chemistry

    Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 990. J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the

    asked by Sam on October 13, 2011
  14. Science

    A chemist weighed out 5.16 g of a mixture containing unknown amunts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of

    asked by Genn on April 20, 2010
  15. Physics

    A metal cylinder with a area of 0.01m^2 and height of 0.1m is suspended levelly in water with a thin string. a)What is the water pressure on the top and bottom of the cylinder if the cylinder top is 1m below the water surface? And the amount of buoyant

    asked by Jermaine on April 24, 2012
  16. Chemistry

    when 2 moles of potassium chlorate crystals decompose to potassium chloride crystals and oxygen gas at a constant pressure and temperature, 78.0 kj of heat is given off. write a thermodynamic equation for this reaction.I don't know how to set up the

    asked by Cynthia on October 16, 2014
  17. Physics, fluid mechanics

    The temperature of earth atmosphere drops 5°C for every 1km elevation above the earth surface. If the air temperature at ground level is 15°C and 760 mmHg, determine the elevation in m when the pressure is 380 mmHg. Assume the air is an ideal gas with

    asked by Eurt on June 10, 2017
  18. College Chemistry

    Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 955 J of energy, to what volume will the gases expand against a constant pressure of 675 torr if all the

    asked by Amanda on October 31, 2011
  19. Chemistry

    A sample of gas occupies a volume of 63.1 mL. As it expands, it does 130.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas? I know that P= 1.03 ATM when converted. I think I'm supposed to use the

    asked by Anonymous on January 31, 2013
  20. chem

    a 275mL sample of vapor in equilibrium with 1-propylamine at 25C is removed and dissolved in 0.500L of H20. For 1-propalamine, Kb=3.72*10^-4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of

    asked by leanna on March 22, 2011
  21. Science

    A chemist weighed out 5.16 g of a mixture containing unknown amunts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of

    asked by Genn on April 20, 2010
  22. chemistry

    Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 885 J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the

    asked by Brandon on October 23, 2012
  23. chemistry help!!! (clueless)

    1. Consider the conductance meter and the titration method of determining the salt content of a brine sample. Discuss at least two advantages and two disadvantages of each method. 2. A corrosion technologist pipetted a 50.00 mL sample of an unknown brine

    asked by lightning on June 19, 2006
  24. chemistry

    The freezing of water at 0⁰C can be represented as follows: H2O (l) ↔ H2O(s) The density of liquid water is 1.00 g/cm3. The density of ice is 0.92 g/cm3. explain why applying pressure causes ice to melt.

    asked by Ciaria on March 12, 2015
  25. Chemistry

    Calculate the height, in feet, of a column of water that would exert the same pressure as a column of mercury that is 754 mm high. (The density of mercury is 13.6 g/cm3 and the density of water is 100 g/cm3.)

    asked by Zandria on June 14, 2009
  26. physics

    How large a pressure increase (in ATM) must be applied to water if it is to be compressed in volume by 1%? The bulk modulus of water is 2 ~ 10^9 N/m^2 and 1 ATM = 10^5 N/m^2 I think that it is P = bulk modulus * 0.01 because 1/100 = 0.01, which is 1% of

    asked by Charlie on December 11, 2008
  27. Chemistry

    Which temperature change would cause the volume of a sample of an ideal gas to double when the pressure of the sample remains the same? 1. from 200°C to 400°C 2. from 400°C to 200°C 3. from 200K to 400K 4. from 400K to 200K

    asked by . on April 12, 2009
  28. Chemistry

    Question: Chloroform, CHCl3, a volatile liquid was once used an anesthetic but has ben replaced by safer compounds. chloroform has a normal boiling point at 61.7 degree C and has a heat of vaporization of 31.4 kj/mol. compute its vapor pressure at 36.2

    asked by eliz on March 17, 2009
  29. English

    How do you paraphrase this statement? A brain aneurysm is a ballooning-out of the wall of an artery in the brain. Often this wall is weakened by disease, injury or an abnormality present at birth. Aneurysms are often caused or made worse by high blood

    asked by kanae on June 4, 2008
  30. physics

    Мощность монохроматического света (λ=560нм), падающего нормально на поверность кружка диаметром d=5мм, равна 8,33мВт. Найти световое давление Р,

    asked by lisa reid on February 9, 2012
  31. HISTORY

    5. Regarding the Ottoman territories during the period immediately following World War I, which of the following statements is false? A. In 1919, Mustafa Kemal began organizing Turkish resistance. B. In 1921, Greek forces advanced almost to Ankara. C.

    asked by emma on March 31, 2016
  32. AP Statistics

    Nurse practitioners are nurses with advanced qualifications who often act much like primary care physicians. Medical researchers wnat to design a study to compare the effectiveness of nurse practitioners and physicians. They recruit 1200 volunteer subjects

    asked by Becky on December 16, 2011
  33. Chemistry

    2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1. 1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2. How will the new

    asked by Colin on April 18, 2013
  34. chemistry

    Ammonia is often produced by reacting nitrogen gas with hydrogen gas. How many liters of ammonia gas can be formed from 12.9 L of hydrogen gas at 93.0°C and a pressure of 43.5 kPa? (Assume an excess amount of nitrogen gas.) I have absolutely no idea how

    asked by kendall on March 17, 2015
  35. AP CHEMISTRY

    Consider the reaction. PbCO3(s) PbO(s) + CO2(g). calculate the equilibrium pressure of CO2 in the system at the following temperatures.(IN atm) (a) 270°C (b) 480°C ..... delta Hf(KJ/mol).. d.Gf(KJ/mol).. S(J/mol-K) PbCO3(s)..-699.1 .. -625.5 .. 131.0

    asked by DAN on March 20, 2012
  36. statistics

    To see whether people are keeping their car tires inflated to the correct level of 35 pounds per square inch (psi), a tire company manager selects a sample of 36 tires and checks the pressure. The mean of the sample is 33.5 psi, and the population standard

    asked by Anonymous on October 8, 2013
  37. chemistry

    Phosgene (COCl2) is an extremely poisonous gas that was used extensively in World War I as a chemical warfare agent. At 300oC, phosgene decomposes to carbon monoxide and chlorine with a Kp = 6.8 x 10-2. Calculate the pressure in the vessel at equilibrium

    asked by Samuel on October 13, 2008
  38. chm

    A cylinder with a movable piston contains 2.00 of helium,He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the

    asked by sarah on October 10, 2008
  39. Chemistry

    A gas at 65 degrees Celsius occupies 4.22L. At what Celsius temperature will the volume 3.87L, assuming the same pressure? -kay so ive tried this one like a million times & i cant seem to get the right answer so pls talk me through the steps. like i know

    asked by kLb on February 21, 2011
  40. Chemistry

    To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. A chemical engineer places a mixture of noble gases consisting of 4.50 g of He, 15.0 g of Ne, and 33.6 g of Kr in a piston-cylinder

    asked by Arian on October 18, 2010
  41. chem

    C6H12O6(aq)->2 C2H5OH(aq) + 2CO2(g) Fermentation of 744mL grape juice(density=1.0 g/cm^3) is allowed to take place in a bottle witha V of 825mL until 12% by volume is ethanol (C2H5OH). Assuming CO2 is insoluble in H2O what would the pressure be of the CO2

    asked by mel on November 16, 2007
  42. physics

    The greatest ocean depths on earth are found in the Marianas Trench near the Philippines, where the depth of the bottom of the trench is about 11.0 km. Calculate the pressure due to the ocean at a depth of 10.1 km, assuming sea water density is constant

    asked by Amy on July 18, 2013
  43. Chemistry

    0.0337g of a volatile liquid when vaporized completely at 100Pa and 300K occupied a volume of 20cm3. When this volume of vapor was completely burnt in an excess of oxygen, 40cm3 of carbon dioxide and 20cm3 of water vapor were formed. All volumes being

    asked by Shaun on February 18, 2012
  44. Chemistry

    A 0.528 gram sample of a metal, M, reacts completely with sulfuric acid according to: M+H2SO4 -> MSO4+H2 A volume of 205 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure

    asked by Bill on October 18, 2012
  45. chemistry

    I posted this question on April 16 and received lots of help..but need more.. thanks Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of

    asked by Julia on April 18, 2007
  46. Chemistry

    Could someone explain Le Chatelier's principle to me? Thanks Reactions tend to go to the direction that reduces stress: stress from pressure, temperature. If a reaction gives off heat (exothermic), it will go faster if temperature is reduced, ie, it is

    asked by Aubrey on March 15, 2007
  47. chemistry

    One way that safety enters into specifications is to specify the composition of a vapor in air that could burn if ignited. If the range of concentration of benzene in air in which ignition could take place is 1.4 to 8.0 percent, what would be the

    asked by Jack on November 5, 2010
  48. Chemistry

    The efficacy of certain drugs is affected by pH. Many drugs are absorbed into the blood through cells lining the stomach or the small intestine by direct diffusion across the plasma membrane. Since the interior of the plasma membrane is hydrophobic,

    asked by Aria on September 23, 2016
  49. Chemistry

    A mixture contains 5.0 g of He, 1.0 g of Ar, and 3.5 g of Ne. Calculate the volume of this mixture at STP. Calculate the partial pressure of each gas in the mixture at STP.

    asked by Jenny on March 28, 2012
  50. chem

    A hemoglobin molecule (molar mass =65000 g) can bind up to 4 oxygen molecules. In a certain experiment a .085-L solutoin containing 6.0 g of deoxyhemoglobin was reacted with excess of oxygen in a constant-pressure calorimeter of negligible heat capacity.

    asked by Mischa on October 4, 2008
  51. Chemistry

    I posted this question on Thursday April 12 and received some help..but need more.. thanks Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass

    asked by Julia on April 16, 2007
  52. Please help!

    The following data describe the binding of oxygen to human myoglobin at 37oC. P02 (mm Hg) = 0.5 1 2 3 4 Theta = .161 .277 .434 .535 .605 P02 (mm Hg) = 6 8 12 20 Theta = .697 .754 .821 .885 From these data, estimate: a). P50 b) the fraction saturation of

    asked by Gulzaman on September 29, 2007
  53. Physics

    Suppose you're an astronaut and you're sitting in a 6000kg space capsule riding on a 4000 m x 8000 m sail (whose mass is included in the 6000 kg). You're orbiting in the vicinity of a distant bright hot star giving off light with an intensity 8 x 10^9

    asked by M on May 7, 2015
  54. Thermodynamics

    A closed cycle gas turbine unit operating with max. And min. Temp. Of 760 and 20 Celsius deg has a pressure ratio of 7/1. Calculate the thermal efficiency and work ratio? Ans = 42.7 % , 0.505 My answers are : Efficiency 42.7 % which is correct.. but work

    asked by Akki on November 26, 2015
  55. chemistry

    2C3H6(g) + 2NH3(g) + 3O2(g) -> 2C3H3N(g) + 6H2O(g) A 150.0 liter steel reactor at 25 ºC is filled with the following partial pressures of reactants: 0.500 MPa C3H6, 0.800 MPa ammonia, and 1.500 MPa oxygen gas. If the reaction proceeds to 90% yield, and no

    asked by keitanako on March 18, 2014
  56. physics

    The greatest ocean depths on earth are found in the Marianas Trench near the Philippines, where the depth of the bottom of the trench is about 11.0 km. Calculate the pressure(atm)due to the ocean at a depth of 10.1 km, assuming sea water density is

    asked by Alice on July 18, 2013
  57. Chemistry

    Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the

    asked by Mattie on November 18, 2010
  58. Chemistry

    A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial temperature of individual acid and base was 23.0 oC. The final temperature after mixing was 25.5 oC. The specific heat of the

    asked by Kelly on March 6, 2018
  59. chem

    A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation:

    asked by laura on December 6, 2011
  60. chem sorry the last one did not have the question

    A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation:

    asked by laura on December 6, 2011
  61. Chemistry

    A mouse is placed in a sealed chamber with air at 755.0 torr. This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 1.70 L, the temperature is held constant

    asked by Kales on November 6, 2014
  62. thermodynamic

    An air tank with a volume of 20m^3 is pressurized to 10 MPa. The tank eventually reaches room temperature of 25 degree C. If the air inside is allowed to escape without any heat transfer to the environment unit reaches a pressure of 200 KLPa, find the

    asked by chris on January 16, 2011
  63. calc

    A machine lengthens a metal cylinder by rolling it under pressure. The radius of the cylinder decreases at a constant rate of 0.05 inches per second while the volume stays constant at 128π cubic inches. At what rate is the length L changing when the

    asked by ashley --- HELP PLEASEE!!! on December 28, 2011
  64. Physics

    A faulty celcius thermometer read 0.7 degree celcius at the melting point of pure ice and 99.5 at the boiling point of water at normal pressure. Calculate the correct temperature when it reads 30 degree celcius. At what temperature will its reading be

    asked by Shredder on January 25, 2016
  65. Chemistry

    Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) NH3(g) + HI(g) At 400°C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C. Please help!

    asked by Sarah on March 9, 2012
  66. AP Chem

    An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

    asked by Sarah on March 10, 2012
  67. HELP

    Calculate the change in energy when 665.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K So i used the formula change in energy = change in H - nRT

    asked by Chemistry on January 27, 2011
  68. pressure

    a flexible container at an initial volume of 7.14L contains 9.51mol of gas. more gas is then added to the container until it reaches final volume of 17.1L. assuming the pressure and temperature of the gas remain constant, calculate the number of moles of

    asked by Anonymous on September 18, 2013
  69. Physics

    1. What is the pressure on the bottom of an aquarium 0.30 m deep filled with water? 2. The plug in a bathtub is 10 cm^3in area and is 0.8 m below the surface of the water. What is the force of the water on the plug? 3. If a column of oil 0.89 m high in

    asked by Tsunayoshi on September 3, 2014
  70. Thermodynamic

    N2 is described by its state properties of temperature @ - 100 Degree C, and pressure @10.0 MPa. Determine if it is reasonable to assume that the given substance behaves as an ideal gas at the specified state. If the substance is determined as a real gas

    asked by chris on January 10, 2011
  71. Physics

    A rigid tank contains 1.20 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 28.5 atm to 5.30 atm. Assume the volume of the tank and the temperature of the gas remain

    asked by Stacy on November 5, 2010
  72. chemistry

    Container A holds 767 mL of ideal gas at 2.50 atm. Container B holds 144 mL of ideal gas at 4.70 atm. If the gases are allowed to mix together, what is the resulting pressure?

    asked by marie darling on March 13, 2013
  73. chemistry

    For Ethanol, change in H vapor = 38.7 kj/mol at 78 degrees Celsius, it's boiling point. Calculate change in S for the vaporization of 1.00 mol ethanol at 78 degrees celsius and 1.00 atm pressure

    asked by miranda on July 21, 2011
  74. AP chem

    An apparatus consists of a 4 L flask containing nitrogen gas at 32C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

    asked by Sarah on March 10, 2012
  75. chemistry

    TWO IDENTICAL mano METERS ARE FILLED WITH MERCURY. THE mano METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE manometer CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO

    asked by Joseph on June 2, 2015
  76. english

    4.Type the appositive(s) in each sentence. You do not need to include the commas. The famous basketball player Michael Jordan was known for his performance under pressure. 5. Type the appositive(s) in each sentence. You do not need to include the commas. A

    asked by Cassandra on June 23, 2011
  77. chemistry

    TWO IDENTICAL mano METERS ARE FILLED WITH MERCURY. THE mano METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE manometer CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO

    asked by PLEASE HELP!! on June 3, 2015
  78. AP CHEMISTRY

    I've got another question. it's similar to this but this time with Kp. Here's the question: For the equilibrium 2IBr(g) I2(g) + Br2(g) Kp = 8.5 10-3 at 150.°C. If 0.016 atm of IBr is placed in a 2.5-L container, what is the partial pressure of all

    asked by Stan3000 on February 7, 2012
  79. psychology

    My instructor assign me of one the "senses." This the one my instructor had assign to me= “The Skin Senses”: Which includes Touch, Pressure, Temperature, and Pain. The instruction is to (Briefly describe how The Skin Senses work and its importance.

    asked by Sharon on June 15, 2011
  80. physics

    A brick weight 17.8N and is resting on the ground. Its dimensions are 0.203mx0.089mx0.0570m. A number of the bricks are then stacked on top of this one. What is the smallest number of whole bricks (including the one on the ground) that could be used, so

    asked by Janaiby on May 29, 2013
  81. Chem

    A flexible container at an initial volume of 5.12 L contains 7.51 mol of gas. More gas is then added to the container until it reaches a final volume of 18.3 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles

    asked by wendy on December 10, 2014
  82. chem

    A flexible container at an initial volume of 4.11 L contains 7.51 mol of gas. More gas is then added to the container until it reaches a final volume of 15.9 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles

    asked by Rachel on March 7, 2018
  83. physics

    A rigid tank contains 1.80 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 21.6 atm to 5.80 atm. Assume the volume of the tank and the temperature of the gas remain

    asked by Meagan on December 13, 2014
  84. Physics

    A rigid tank contains 1.80 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.9 atm to 4.80 atm. Assume the volume of the tank and the temperature of the gas remain

    asked by idwsh on November 5, 2010
  85. chemisrty

    as a system increases in volume it absorbs 52.5 j of energy in the form of heat form the surroundings. the piston is working against a pressure of 5.00 atm. The final volume of the system is 58,0 L. What is the initial volume of the system if the internal

    asked by Jay on November 16, 2010
  86. physics

    A horizontal pipe of diameter 0.845 m has a smooth constriction to a section of diameter 0.507 m. The density of oil flowing in the pipe is 821 kg/m3 . If the pressure in the pipe is 8350 N/m2 and in the constricted section is 6262.5 N/m2 , what is the

    asked by ryan on June 17, 2011
  87. chemistry

    at certain altitude in the upper atmosphere, the temperature is estimated to be -100 degree celsius and the density just 10^-9 that of the earth's atmosphere at STP. Assuming a uniform atmosphere at STP. Assuming a uniform atmospheric composition, what is

    asked by taylor on March 14, 2016
  88. chem

    A flexible container at an initial volume of 8.15 L contains 2.51 mol of gas. More gas is then added to the container until it reaches a final volume of 12.1 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles

    asked by keisha on November 9, 2015
  89. AP Chemistry

    Hey guys! What is the rate constant is particularly sensitive to: 1 A change in volume 2 A change in pressure 3 A change in product concentration 4 A change in reactant concentration 5 A change in the activation energy I feel like it is a change in the

    asked by Allie on September 20, 2015
  90. Chemistry

    A Balloon Time® tank holds 15% excess capacity to fill 50 helium balloons measuring 9” or 0.5 ft3 in volume at 1 atm and 22 oC. The gauge pressure of a new tank is 260 psi. What is the volume of a Balloon Time® tank in ft3?

    asked by Veronica on October 29, 2012
  91. Chemistry

    A hydrocarbon gas burned completely in O2 to give CO2 and H2O.It was found that one volume of hydrocarbon gas at STP produced two volumes of CO2 and three volumes of steam corrected at the same temperature and pressure. What is the emperical formula of

    asked by Elie on August 7, 2012
  92. College Physics

    Which one of the following statements about a thermodynamic engine is not true, i.e., which one of the statements is false? 1)The internal energy is always the same at the beginning and at the end of one cycle. 2)The absorbed and the exhausted heat have

    asked by Tracy on November 22, 2010
  93. Health

    1. The addictive chemical found in all tobacco products is A. tar B. nicotine** C. carbon monoxide D. insulin 2. A person who hasn’t smoked for 2 hours and is irritable is showing symptoms of (pick 2) A. respiration B. hunger** C. withdrawal D.

    asked by Kristina on February 12, 2016
  94. Chemistry - bobpursley pls help

    Posted by candy on Tuesday, September 21, 2010 at 3:12pm. Yes, my NaOH is granular. Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks

    asked by candy on September 21, 2010
  95. chemistry

    an oxygen tank contains 12.0 L at 25 degree C and 3 atms. After a 4 L canister of oxygen at 25 degree C and 3 atms is emptied into the storage tank, what will happen to the temperature and pressure of the tank to be?

    asked by ayesha on April 21, 2012
  96. Chemistry

    A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?

    asked by Brittney on June 11, 2010
  97. physicssss

    Six grams of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 1.3 cm3 to 2393 cm3. The latent heat of vaporization of water is 2.26 × 106 J/kg. Find the work done. Answer in units of J Find the

    asked by physicshelp on January 13, 2013
  98. Physics

    I have to compare and contrast three types of tires, and relate them to physics. I've chosen: Racing tires Winter tires All season tires I've chosen to compare them on: Tire tread pattern Rubber compound ??? As you can see, I need something else to

    asked by Lucy on March 1, 2008
  99. P-Chemistry

    A closed vessel of volume 2.50 dm3 contains 100g of nitrogen (N2) and 100g of carbon dioxide (CO2) at 25 C. What are the partial pressures and mole fractions of each gas? Can you check my answers.Thank you. I got Partial Pressure for N2=34.95 atm CO2=22.24

    asked by Jessy on September 5, 2016
  100. Chemistry 105

    Ozone is depleted in the stratosphere by chlorine from CF3Cl according to the following set of equations: CF3Cl+UV light-->CF3+Cl Cl+O3-->ClO+O2 O3+UV light-->O2+O ClO+O-->Cl+O2 What total volume of ozone measured at a pressure of 22.0 mmHg and a

    asked by JULIE on October 23, 2011