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Asked by Emma

Please I want to know the gaseous composition of inhale and exhale air?

You inhale about 21% oxygen, 78% nitrogen and the other 1% is made up of many gases like carbon dioxide, argon, neon, helium and hydrogen. You exhale about 5% carbon dioxide, 16% oxygen, 78% nitrogen, and the other 1% is again many small amounts of different gases.

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Grace Horn
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