The Major Constituents of Air Are Nitrogen (78%), Oxygen (21%)

Multiple Choice

The major constituents of air are nitrogen (78%) , oxygen (21%) , carbon dioxide (0.5%) , and inert gases. The number of particles present in one volume of air is _____ the number of particles in one volume of pure oxygen.

A) equal to
B) four times greater than
C) 79 times greater than
D) 21% lesser than
E) one fourth