Li Crop Pages Header & Footer - Watermark Boyle's Law, Charles's Law, and Avogadro's Law If 5.00 g of O2 has a volume of 7.20 L at a certain temperature and pressure, what volume does 15.0g of O2 hau under the same conditions? Which gas law should you use? (use A = Avogadro's, B = Boyle's, C Charleş's) |

Li Crop Pages Header & Footer - Watermark Boyle's Law, Charles's Law, and Avogadro's Law If 5.00 g of O2 has a volume of 7.20 L at a certain temperature and pressure, what volume does 15.0g of O2 hau under the same conditions? Which gas law should you use? (use A = Avogadro's, B = Boyle's, C Charleş's) |

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter5: Gases

Section: Chapter Questions

Problem 34QAP: Titanium(III) chloride is used in the manufacture of polyethylene. It is produced by the reaction...

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You have a gas, one of the three known phosphorus-fluorine compounds (PF3, PF3, and P2F4). To find out which, you have decided to measure its molar mass. (a) First, yon determine that the density of the gas is 5.60 g/L at a pressure of 0.971 atm and a temperature of 18.2 C. Calculate the molar mass and identify the compound. (b) To check the results from part (a), you decide to measure the molar mass based on the relative rales of effusion of the unknown gas and CO2. You find that CO2 effuses at a rate of 0.050 mol/min, whereas the unknown phosphorus fluoride effuses at a rate of 0.028 mol/min. Calculate the molar mass of the unknown gas based on these results.
In the Mthode Champenoise, grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is C6H12O6(aq)2C2H5OH(aq)+2CO2(g) Fermentation of 750. mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a total volume of 825 mL until 12% by volume is ethanol (C2H5OH). Assuming that the CO2 is insoluble in H2O (actually, a wrong assumption), what would be the pressure of CO2 inside the wine bottle at 25C? (The density of ethanol is 0.79 g/cm3.)
A 0.0130-g sample of a gas with an empirical formula of C4H5 is placed in a 165-mL flask. It has a pressure of 13.7 mm Hg at 22.5 C. What is the molecular formula of the compound?
5-107 If 60.0 g of NH3 occupies 35.1 L under a pressure of 77.2 in. Hg, what is the temperature of the gas, in °C?
Which of the following statements is(are) true? a. If the number of moles of a gas is doubled, the volume will double, assuming the pressure and temperature of the gas remain constant. b. If the temperature of a gas increases from 25C to 50C, the volume of the gas would double, assuming that the pressure and the number of moles of gas remain constant. c. The device that measures atmospheric pressure is called a barometer. d. If the volume of a gas decreases by one half, then the pressure would double, assuming that the number of moles and the temperature of the gas remain constant.
Silane, SiH4, is the silicon analogue of methane, CH4. It is prepared industrially according to the following equations: Si(s)+3HC1(g)HSiCl3(l)+H2(g)4HSiCl3(l)SiH4(g)+3SiCl4(l) a. If 156 mL HSiCl3 (d = 1.34 g/mL) is isolated when 15.0 L HC1 at 10.0 atm and 35C is used, what is the percent yield of HSiCl3? b. When 156 mL HSiCl3 is heated, what volume of SiH4 at 10.0 atm and 35C will be obtained if the percent yield of the reaction is 93.1%?
5-37 A sample of a gas at 77°C and 1.33 atm occupies a volume of 50.3 L. (a) How many moles of the gas are present? (b) Does your answer depend on knowing what gas it is?
Potassium peroxide is used to absorb the CO2 produced by the people in a space vehicle. 2K2O2(s)+2CO2(g)2K2CO3(s)+O2(g)If a person at rest exhales 3.0 L of air per minute and CO2 is 3.4% (by volume) of exhaled air, how many grams of K2O2 are needed per person for a five-day trip. Assume a temperature of 250 and 728 mm Hg pressure.
What is the value of the ideal gas constant R if the volume is specified in milliliters rather than liters?
A typical barometric pressure in Kansas City is 740 torr. What is this pressure in atmospheres, in millimeters of mercury, and in kilopascals?
5-33 A certain quantity of helium gas is at a temperature of 27 °C and a pressure of 1.00 atm. What will the new temperature be if its volume is doubled at the same time that its pressure is decreased to one-half its original value?
Titanium(III) chloride is used in the manufacture of polyethylene. It is produced by the reaction (at high temperatures) between TiCl4 gas and H2. 2TiCl4(g)+H2(g)2TiCl3(s)+2HCl(g)Assume 100% yield and constant temperature and pressure. (a) How many liters of HCI gas can be produced by mixing 3.72 L of TiCl4 and 4.50 L of H2? (b) How many liters of reactant in excess are present after the reaction is complete?