In comparison to the amount of atmospheric oxygen inhaled in a normal breath, one breath of pure oxygen from a tank provides how much oxygen?
A)five times as much
B)twice as much
C)half as much
D)one-fifth as much

Question

Quizplus · Accepted Answer

Pure oxygen from a tank contains approximately 100% oxygen, whereas the air we breathe contains only about 21% oxygen. Therefore, one breath of pure oxygen from a tank provides roughly five times as much oxygen as a normal breath of air.

In Comparison to the Amount of Atmospheric Oxygen Inhaled in a Normal