Question

air contains 21% Dash ​

Answer 1

Answer:

oxygen bro

air contains 21 percent oxygen

plese mark as brainlist

Answer 2

Answer:

Hey mate! here is your answer

Air contains 78%Nitrogen, 21% Oxygen and 1% of other gases like CO2 , CO , SO2 , SO4 , etc.

Hope it helps you DEAR ❤

Plz mark as Brainliest!