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1 vote
How much of Earth's atmosphere is made up of nitrogen and oxygen?

A. 100 percent
B. Between 25 and 75 percent
C. Close to 99 percent
D. Less than 1 percent

User Kanth
by
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2 Answers

4 votes
78% nitrogen, 21% oxygen,

Good luck
User Rand Random
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6 votes
C: close to 99% percent because it is made up of 78% nitrogen and 21% oxygen.

-Enjoy!=)
User Kukunin
by
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