define, what is air
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Answer:
the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
2.
an impression of a quality or manner given by someone or something.
"she answered with a faint air of boredom"
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Explanation:
Air is nothing but of oxygen and nitrogen
It is said that there is something about 72% of nitrogen and 27% of oxygen
It is a mixture of different compounds
like CO2,O2,S02,SO3 etc
Hope you understand
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