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1. Calculate the mole fraction of gas A, which has a pressure of 110. torr, in the air, which has a pressure of 800. torr.
0.138 0.427 0.121 4.23 13.8

2. At constant temperature, pressure, and volume, which molecule has the highest average velocity?
H2 F2 He Br2 All of the above

3. A gas is heated from -10.0oC to 60oC and the volume is increased from 1.0 L to 6.0 L. If the initial pressure is 0.5 atm, what is the final pressure?
0.10 atm 0.11 atm 0.12 atm 0.25 atm 0.50 atm

4. What is the root mean square velocity of methane (CH4) at 273oK?
1 m/s 1304 m/s 310 m/s 652 m/s 16 m/s

5. 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

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