About 99% of the atmosphere is composed of
A. argon and carbon dioxide.
B. nitrogen and oxygen.
C. nitrogen and water vapor.
D. oxygen and carbon dioxide
About 99% of the atmosphere is composed of nitrogen and oxygen.
Expert answered|Score .9727|
Malekith22|Points 746|
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Asked 2/8/2018 12:57:22 AM
Updated 12/11/2020 10:09:19 AM
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