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Air is made of nitrogen, oxygen, carbon dioxide, and small amounts of other gases

Chemistry

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Air is made of nitrogen, oxygen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, if the total is 1 atm, P(N₂) = 583.4 mmHg, P(CO₂) = 9.2 mmHg, and P(others) = 3.1 mmHg?

0.3 atm

0.2 atm

0.4 atm

0.8 atm

How many moles of gas are in a room with a volume of 15.0 L? Another room at the same temperature and pressure has a volume of 21.0 L and 20.3 moles of gas.

11.5 mols

1.4 mols

12.5 mols

14.5 mols

If an experiment’s conditions are changed from 1.3 L, 1.7 atm, and -246°C to STP, what will the new volume be?

1.9 L

24.2 L

24.8 L

22.3 L

75 L of gas is stored at an unknown pressure. If at 3.5 atm, the volume of the gas is 64 L, determine the unknown pressure.

3.0 atm

2.0 atm

2.5 atm

3.2 atm

A deep underground cavern contains 2.24 L of methane gas at a pressure of 35.6 atm and a temperature of 42°C. How many moles of methane does the natural gas deposit contain?

3.08 mol CH₄

1.3 mol CH₄

4.08 mol CH₄

2.09 mol CH₄

Determine the total pressure exerted by a gas mixture of oxygen, nitrogen and helium. P(O₂) = 210. mmHg, P(N₂) = 322. mmHg, and P(He) = 125. mmHg. What is the total pressure?

657 mmHg

0.721 mmHg

0.821 atm

0.921 mmHg