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Which option gives the correct composition(approximately) of the air (% by volume).
Which option gives the correct composition
(approximately) of the air (% by volume).
Nitrogen: 21,
CO
: 0.9, Oxygen:
78, Argon: 0.1
: 0.1, Oxygen:
78, Argon: 0.9
Nitrogen: 78,
21, Argon: 0.1
21, Argon: 0.9
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