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1. A container contains 0.20 moles of O₂ and 0.15 moles of H₂. If the temperature of the container is 273 Kelvin, which is true?
The average molecular speeds of the two gases are the same The total masses of the two gases are the same The partial pressures of the two gases are the same The average kinetic energy of the two gases are the same The molecular masses of the two gases are the same

2. A balloon occupies a volume of 1.0 liter when it contains 0.08 grams of hydrogen gas at STP. If hydrogen gas is added to the balloon while pressure and temp are kept constant, what will be the new volume?
0.50 L 1.0 L 2.0 L 4.0 L 5.0 L

3. A volume of an unknown gas is 300 L at STP. What volume will the gas occupy at 0.0 ^oC and 1000. torr?
209 L 12.3 L 46.3 L 227 L None of the above

4. At 298^oK, 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

5. If you have a gas taking 14.0 L at 800. torr and 26^oF, calculate the volume of the gas at 40^oC and 2 atm.
4.13 L 16.34 L 8.27 L 5674 L 4.26 L

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