Question

what is the presentage of O2 in inheald air​

Answer 1

Answer:

20.95%

Inhaled air is by volume 78% nitrogen, 20.95% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount.

Answer 2

Answer:

21℅

Explanation:

There is 21% oxygen in inhaled air.

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