Question

what is the percentage of oxygen in expired air when a person is resting​

Answer 1

Answer:

Gas % in inhaled air % in exhaled air

Oxygen 21 16

Carbon dioxide 0.04 4

Nitrogen 79 79

Answer 2

Answer:

16%

Exhaled air contains less oxygen and more carbon dioxide, it is also saturated with water vapour. Exhaled air contains: 78% nitrogen. 16% oxygen.

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