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  4. Calculate standard molar volume of He, if measured density of He at STP is 0.1784 g / L

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Q. Calculate standard molar volume of $He$, if measured density of $He$ at STP is $0.1784 \,g / L$

Some Basic Concepts of Chemistry

Solution:

Standard molar volume is the volume occupied by $1$ mole of a gas at STP

$0.1784 \,g$ of He occupies volume $=1 \,L$

$\therefore 4 \,g$ ( i.e. 1 mole ) of He occupies the volume

$=\frac{4}{0.1784}=22.4\, L$