Question

o2 percentage in atmosphere.?​

Answer 1

Answer:

O2 percentage in Atmosphere : 20.95

Hope it helps

Answer 2

Answer:

20.95%

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.