90.5k views
0 votes
Why are the amounts of gases in the atmosphere usually shown as percentages of dry air

User Nicocesar
by
6.4k points

1 Answer

5 votes
This is because the humid air contains water content which shows off the percentages of gases present in it. When it rains, the oxygen content lowers in the air due to presence of so much water content in it.

User Erasmus Cedernaes
by
6.6k points