B.
2. What are the two main constituents of the earth's atmosphe
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Answered by
1
Answer:
Nitrogen and Oxygen
Explanation:
Nitrogen constitutes 78% of atmospheric air.
Oxygen constitutes 21% of atmospheric air.
And other gases like argon , Carbon dioxide etc. constitute 0.9% of atmospheric air.
It totally forms 99.09% .
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Answered by
0
Answer:
Nitrogen — 78 percent.
Oxygen — 21 percent.
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