1.

What are the percentages of nitrogen, oxygen, argon and carbon dioxide in atmosphere?

A. 78%, 21%, 0.9%, 0.03%
B. 75%, 24%, 0.7%, 0.03%
C. 71%, 28%, 0.9%, 0.04%
D. 75%, 24%, 0.9%, 0.05%
Answer» B. 75%, 24%, 0.7%, 0.03%


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