If 20 percent of the air is composed of O₂, what is the partial pressure of oxygen at sea level, where atmospheric pressure is 760 mmHg
A)20 mmHg
B)70 mmHg
C)152 mmHg
D)760 mmHg

Question

Quizplus · Accepted Answer

If 20% of the air is composed of O₂, then the partial pressure of oxygen is proportional to 20% of the atmospheric pressure. Therefore, the partial pressure of oxygen is:

(20/100) x 760 mmHg = 152 mmHg

If 20 Percent of the Air Is Composed of O₂