Problem: A gas mixture with a total pressure of 700 mmHg contains each of the following gases at the indicated partial pressure: 126 mmHg CO2, 220 mmHg Ar and 188 mmHg O2. The mixture also contain helium gas.Part AWhat is the partial pressure of the helium gas?Express your answer in millimeters of mercury.

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A gas mixture with a total pressure of 700 mmHg contains each of the following gases at the indicated partial pressure: 126 mmHg CO2, 220 mmHg Ar and 188 mmHg O2. The mixture also contain helium gas.

Part A

What is the partial pressure of the helium gas?

Express your answer in millimeters of mercury.