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  4. x L of N 2 at STP contains 3 × 1022 molecules. The numbe of molecules in x / 2 L of ozone at STP will be

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Q. $x L$ of $N _{2}$ at STP contains $3 \times 10^{22}$ molecules. The numbe of molecules in $x / 2 L$ of ozone at STP will be

Some Basic Concepts of Chemistry

Solution:

Equal volume of gases contain equal number of molecules at STP.

$\therefore $ Half volume $\frac{x}{2}\, L$ will contain half number of molecules.

i.e. $\frac{1}{2} \times 3 \times 10^{22}=1.5 \times 10^{22}$