Question

What is the percentage of oxygen present in air.​

Answer 1

Answer:

21%. is present in the air .........

I hope you anderstand sir...........

Answer 2

$\: \: \boxed{\boxed{\sf{\mapsto \: Firstly \: Lets \: us \: Understand}}}$

$\mathsf{● \: Atmosphere \: is \: the \: layer \: of \: gases \: surrounding \: the \: planet}$

$\mathsf{● \: The \: major \: gases \: in \: atmosphere \: are \: nitrogen, \: oxygen, \: argon,}$

$\mathsf{carbon \: dioxide}$

$\mathsf\red{☆}\mathsf{Earth’s \: atmosphere \: is \: approximately \: made \: up \: of \: 78 \% \: nitrogen \: and}$

$\mathsf{21\% \: oxygen}\red{☆}$