Question

Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is​

Answer 1

oxygen

Step-by-step explanation:

Nitrogen is 78%

oxygen is 21%

carbon dioxide is 0.02%

and water vapour and sometime Noble gas varies

Answer 2

Oxygen

Step-by-step explanation:

Oxygen is 21% of the gases that make up our air