Answers

2015-04-02T18:17:31+05:30
Oxygen-21%
nitrogen-78%
carbon dioxide-0.09%
water vapour-varies
other gases and dust particles-0.03%
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2015-04-02T18:21:40+05:30
The air in our atmosphere is composed of molecules of different gases.The most common gases are Nitrogen(78%),Oxygen(about 21%) and argon(about 1%).Other molecules are present in the atmosphere as well,but in very small quantities.
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