Question

What is percentage of oxygen in the atmosphere?​

Answer 1

Answer:

21 percent

Explanation:

Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases.

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Answer 2

Answer:

21 %

Explanation:

Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases.