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1. What is the density of methane at 1.00 atm and 298oK?
0.327 g/L 0.654 g/L 1.308 g/L 4.26 g/L None of the above

2. A mixture of gases contains 48 g O2, 84 grams N2, 9.0 grams of water vapor. If the total pressure is 700 mmHg, what is the partial pressure of the nitrogen gas?
0.092 atm 0.28 atm 0.37 atm 0.46 atm 0.55 atm

3. A mixture of nitrogen gas and oxygen gas is kep at constant temperature. Which is true?
Average kinetic energies will be the same Average molecular speed will be the same Partial pressures will be the same Total masses will be the same Densities will be the same

4. A sample of N2 was collected over water at 20oC and a total pressure of 760 mmHg. A total volume of 0.250 L was collected. What mass of nitrogen was collected? (Vapor pressure of water is 17.5 torr)
0.101 g 0.286 g 0.598 g 0.121 g None of the above

5. At constant temperature, pressure, and volume, which gas has the most molecules?
He H2 Cl2 F2 All of the above

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