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1. At 298oK, 800. torr, and 250. mL of gas has a mass of 4.62 grams. What is its molecular weight?
300 46 3.21 0.0107 429

2. An oxygen sample contains volume of 6.00 L at 25oC and 900. torr. How many molecules does this sample contain?
0.291 0.502 2.46*10^23 1.75*10^23 6.02*10^23

3. Which of these conditions causes the ideal gas laws to fail?
High Pressure High temperature Large Volume High temp and pressure High temp and large volume

4. In a certain container, you have 0.2 moles O2 and 0.3 moles N2. What is the partial pressure of the oxygen at STP?
0.2 atm 0.3 atm 0.4 atm 0.5 atm 0.6 atm

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

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