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A person's lungs might holds 6.0 L of ai...

A person's lungs might holds 6.0 L of air at body temperature (310K) and atmospheric pressure (101 kPa). Given that the air contains 21% oxygen, find the number of oxygen molecules in the lungs.

Text Solution

Verified by Experts

`N=(PV)/(k_(B)T)=((1.01xx10^(5))(6.0xx10^(-3)))/((1.381xx10^(-23))(310))=1.4xx10^(23)` air molecules in the lung.
Hence, there are (0.21) `(1.4xx10^(23))` oxygen molecules in the lungs.
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