Question

$xL{N}_2$ gas at STP contains $3\times {10}^{22}$ molecules. The number of molecules in $xL$ ozone at STP will be:

• A. $3\times {10}^{22}$
• B. $4\times {10}^{23}$
• C. $6.02\times {10}^{23}$
• D. $3\times {10}^{24}$

Answer 1

The correct option is A $3\times {10}^{22}$

As per 'Avagadros law', equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.

So, at STP condition $xL$ of $N_2$ and $xL$ of ozone contains an equal number of molecules

Hence, numbers of molecules of ozone $=3\times {10}^{22}$

Hence, the correct option is $\left(A\right)$.