1. A mixture contains hydrogen at 325 torr pressure, nitrogen at 475 torr pressure, and oxygen at 655 torr pressure. What is the total pressure of gases in the system? Answer
2. At 27 degrees Celsius and 750. torr pressure, what will be the volume of 2.3 moles of neon? Answer
3. Three gases were added to the same 2.0-liter container. The total pressure
of the gases was 790. torr at room temperature (25.0 degrees Celsius). If the
mixture contained 0.65 grams of oxygen, 0.58 grams of carbon dioxide, and an
unknown amount of nitrogen gas, determine:
(a) the total number of moles of gas in the container. Answer
(b) the number of grams of nitrogen in the container. Answer
(c) the partial pressure of each gas in the container. Answers
4. The density of air is 1.29 grams per liter at STP. Calculate the density of air on Pikes Peak, where the pressure is 450. torr and the temperature is 17 degrees Celsius. Answer
5. What is the density of carbon tetrachloride vapor at 714 torr and 125 degrees Celsius? Answer
6. An aerosol spray can with a volume of 325 milliliters contains 3.0 grams of propane (C3H8) as a propellant. What is the pressure of gas in the can at 28 degrees Celsius? Answer
7. The Hindenberg was a famous hydrogen-filled dirigible that exploded in 1937. If the Hindenberg contained 2.0 x 105 cubic meters of hydrogen gas at 27 degrees Celsius and 1.0 atm, what mass of hydrogen was present? Answer
8. A deep breath of air has a volume of 1.05 liters at a pressure of 740 torr and body temperature of 37 degrees Celsius. Calculate the number of molecules in the breath. Answer
9. A scuba diver's tank contains 0.29 kg oxygen gas (O2) compressed
to a volume of 2.3 liters.
(a) Estimate the gas pressure inside the tank at 9oC. Answer
(b) What volume would this oxygen occupy at 26oC and 0.95 atm? Answer
10. Cyanogen, a highly toxic gas, is composed of 46.2% carbon and 53.8% nitrogen. At 25 oC and 750 torr, 1.05 grams of cyanogen occupies 0.500 liters. What is the molecular formula of cyanogen? Answer
