Question

Name the major gas present in the (a) inhaled air (b) exhaled air.

Answer 1

Inhaled air contains approx 21%oxygen, 0.04% carbon dioxide, and 79%nitrogen while exhaled air contains approx 16% oxygen, 4% carbon dioxide, and also 79% nitrogen. The only difference between them is the varying levels of oxygen and carbon dioxide. The inhaled air is actually air.