The percentage of oxygen in inhaled air is about

21 %

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16 %

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79 %

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4 %

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Solution

The correct option is A $21 %$
The percentage of oxygen in the inhaled air is about $21 %$ , which is the same as the percentage of oxygen in the atmosphere. The oxygen content of the air we expire is about $16 %$ .

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Similar questions

The percentage of oxygen in inhaled air is 21%.

The amount of oxygen in the inhaled air is 21% and 0.04% of carbon dioxide.

The percentage of oxygen in inhaled air is ___________.

O_{2}

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