If 20% of the air is composed of O₂, the partial pressure of oxygen at sea level where atmospheric pressure is 760 mm Hg is
A)20 mm Hg
B)760 mm Hg
C)70 mm Hg
D)350 mm Hg
E)152 mm Hg

Question

Quizplus · Accepted Answer

The partial pressure of a gas is calculated by multiplying the percentage of the gas by the total atmospheric pressure. Thus, 20% of 760 mm Hg is 0.20 * 760 = 152 mm Hg.

If 20% of the Air Is Composed of O₂, the Partial