Question

What is the percentage of oxygen in air?​

Answer 1

$\large\fbox\red{Answer}$

Air is a mixture of gases. It contains 79% nitrogen, 21 % oxygen, 0.93% argon, 0.03% carbon dioxide, and traces of hydrogen, helium and other "noble" gases.

Thnku :)

Answer 2

Answer:-

21% Oxygen.

Explanation:-

Air contains mainly nitrogen and oxygen. It also contains carbon dioxide, noble gases, water vapour, dust particles, and traces of other gases.

---------------------------------

Know More:-

$COMPOSITION \: OF \: AIR$

Nitrogen and Oxygen:-

Air contains about 78% nitrogen and 21% oxygen.

Oxygen in air supports burning, whereas nitrogen does not.

Carbon dioxide:-

Air contains about 0.03% of carbon dioxide. Plants and animals take in oxygen and give out carbon dioxide during respiration. Carbon dioxide is also produced when we burn something.

Water Vapour:-

Air contains varying amounts of water vapour depending on the weather of the place. Water in seas, oceans etc evaporates due to sun's heat in the form of water vapour.

Dust and Smoke:-

Air contains dust and Smoke released from factories and vehicles.

________________________