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2 votes
The three main gases in air by volume are?

A. Nitrogen, Oxygen, Carbon Dioxide
B. Nitrogen, Oxygen, Hydrogen
C. Oxygen, Helium, Carbon Dioxide
D. Nitrogen, Oxygen, Argon

asked
User Lukeman
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1 Answer

3 votes
B..
The answer is b.. nitrogen oxygen and hydrogen
answered
User Ramtech
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