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1. The partial pressure of O2 in a sample of air on a mountain top is 115 mmHg. The oxygen makes up 21% of the gas in the atmosphere. What is the total atmospheric pressure on the mountain top?

2. A gaseous mixture contains 54% N2, 39% O2, and 7% CO2 by volume. If the total pressure is 813 mmHg at STP, what is the partial pressure of each of the gases?

3. What volume would be occupied by 80 g of nitrogen gas at a pressure of 1.8 atm and a temperature of 25°C?

4. A gas occupies 0.12 mL at 100 K. At what Celsius temperature will its volume be 2.00 mL? Assume the pressure remains constant.

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