2. Which gas is the most abundant in the Earth's atmosphere?
N2 O2 He H2 CO2
3. At constant temperature, pressure, and volume, which molecule has the highest average velocity?
H2 F2 He Br2 All of the above
4. At constant temperature, pressure, and volume, which gas has the most molecules?
He H2 Cl2 F2 All of the above
5. 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
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