Question: The atmospheric pressure is 1.0 atm and Henry’s law constant for O2 is 1.66 x 10?6 M/mm Hg at 25 °C. Assume air contains 21% oxygen. Calculate the partial pressure of oxygen. (21% of air is oxygen and the mole fraction of O2 is 0.21).

Options

A : 180 mm Hg

B : 130 mm Hg

C : 120 mm Hg

D : 160 mm Hg

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