2.9: Know the Approximate Percentages by Volume of the Four Most Abundant Gases in Dry Air

THE COMPOSITION OF AIR:

s

Table below shows the approximate percentage by volume of the main gases in unpolluted, dry Air:

GAS	PERCENTAGE IN AIR
NITROGEN	78 %
OXYGEN	21 %
ARGON	0.9 %
CARBON DIOXIDE	0.04 %