What the concentration of oxygen

asked Aug 2, 2022 95.0k views

2 votes

by Jaxan

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4 votes

the air required for human breathing is 19.5 percent.

Andor answered Aug 4, 2022

by Andor

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3 votes

Answer:

19.5%

Step-by-step explanation:

Y Durga Prasad answered Aug 7, 2022

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