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Almost 99% of Earth's atmosphere is made up of two gases. What are the two gases and the percents of each? A) 21% oxygen and 78% nitrogen B) 21% water vapor and 78% oxygen C) 21% nitrogen and 78% oxygen
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Almost 99% of Earth's atmosphere is made up of two gases. What are the two gases and the percents of each? A) 21% oxygen and 78% nitrogen B) 21% water vapor and 78% oxygen C) 21% nitrogen and 78% oxygen D) 21% carbon dioxide and 78% oxygen​

User Nikhil Sahu
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2 Answers

1 vote

Answer:

A

Step-by-step explanation:

21% O2 and 78% Nitrogen.

User Displacedtexan
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4 votes

Answer:

A should be the answer. 21% oxygen and 78% nitrogen

Step-by-step explanation:

User Collin K
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