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Pie
3 years ago
14

For human survival, approximately what percentage of air must be oxygen?

Health
2 answers:
irinina [24]3 years ago
8 0
20.9 around 78 percent nitrogen only 20.9 for oxygen
brilliants [131]3 years ago
5 0

Answer:

20.9 percent

Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.

Explanation:

20.9 percent

Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.

Hope this helps.

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