Chem homework


Chapter 6 6.1  2

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  1. The average speed of gas particles depends on what single variable?


6.2  6, 8, 10, 12


  1. What units of pressure are equal to each other?


  1. How many atmospheres are in 223 torr?


  1. How many millimeters of mercury are in 0.334 atm?


  1. How many torr are in 0.777 mmHg?


6.3  2, 8, 14


  1. What unit of temperature must be used for gas laws?


  1. A gas has an initial pressure of 633 torr and an initial volume of 87.3 mL. What is its new pressure if volume is changed to 45.0 mL? Assume temperature and amount are held constant.


  1. A gas has an initial volume of 2.033 L and an initial temperature of 89.3 K. What is its volume if temperature is changed to 184 K? Assume pressure and amount are held constant.


6.4  4, 8, 10, 14


  1. Use Gay-Lussac’s law to determine the final temperature of a gas whose initial pressure is 1.88 atm, initial temperature is 76.3 K, and final pressure is 6.29 atm. Assume volume and amount are held constant.


  1. Use Avogadro’s law to determine the final amount of a gas whose initial volume is 885 mL, initial amount is 0.552 mol, and final volume is 1,477 mL. Assume pressure and temperature are held constant.


Use the combined gas law to complete this table. Assume that the amount remains constant in all cases.

V1 = P1 = T1 = V2 = P2 = T2 =
56.7 mL 1.07 atm −34°C 998 torr 375 K
3.49 L 338 torr 45°C 1,236 mL 392 K
2.09 mL 776 torr 45°C 0.461 mL 0.668 atm



  1. A sample of gas doubles its pressure and doubles its absolute temperature. By what amount does the volume change?




6.5   14, 18


  1. How many moles are present in 334 L of H2 at STP?



  1. What is the density of each gas at STP?








6.6  2, 4


  1. What is the total pressure of a gas mixture containing these partial pressures: PNe = 312 torr, PHe = 799 torr, and PAr = 831 torr?



In a gas mixture of O2 and N2, the total pressure is 2.66 atm and the partial pressure of O2 is 888 torr. What is the partial pressure of N2?









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