Question

write down the composition of air in per cent by volume​

Answer 1

Answer:

air is a mixture of many gases it contains 78% Nitrogen ,21% Oxygen, and 0.03% Carbon dioxide some water vapour and other gases.

Answer 2

Answer:

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.[8] Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

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