If $32 \mathrm{g}$ of ${\mathrm{O}}_2$ contains $6·022\times {10}^{23}$ molecules at NTP, then, $32 \mathrm{g}$ of $\mathrm{S}$ under the same conditions, will contain

Which of the following samples will have the same volume under similar conditions of temperature and pressure?

$\mathrm{a}.$ $64 \mathrm{g} {\mathrm{SO}}_2$

$\mathrm{b}.$ $4 \mathrm{g} \mathrm{He}$

$\mathrm{c}.$ $16 \mathrm{g} {\mathrm{O}}_2$

$\mathrm{d}.$ $6.023\times {10}^{23}$ molecules of ${\mathrm{N}}_2$.

The number of atoms in $3.2 \mathrm{g}$ of oxygen gas is