Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O2 at 1 atm if PN2 = 593.4 mm Hg, PCO2 = 3.0 mm Hg, and Pothers = 7.1 mm Hg?

Answer 1

Since 1 atm = 760 mmHg, P(O₂) = 760 - 593.4 - 3.0 - 7.1 = 156.5 mmHg.