Question

Determine the total pressure of a gas mixture that contains oxygen at a pressure of 150. mmHg, nitrogen at 350.mmHg pressure, and helium at a pressure of 200.mmHg. Give your answer in mmHg and in atm.

Answer 1

Total pressure is the sum of all partial pressures of all components:

150 mmHg + 350 mmHg + 200 mmHg = 700 mmHg

700 mmhg = 0.92 atm