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About 99% of the atmosphere is composed of A. nitrogen and oxygen. B. argon and carbon dioxide. C. nitrogen and water vapor. D. oxygen and carbon dioxide.
About 99% of the atmosphere is composed of nitrogen and oxygen.
Expert answered|Score 1|Malekith22|Points 625|
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Asked 1/10/2018 7:31:58 AM
Updated 1/10/2018 8:54:35 AM
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