Calculate the vapour density of ${SO}_{2}$ $(O = 16, S = 32)$ .

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Solution

Vapour density of a gas is the ratio of mass of a certain volume of gas or vapour to the mass of the same volume of hydrogen under the same temperature and pressure.
It is related to the molecular weight of the gas as follows :
Molecular weight of the gas = Vapour density of gas x 2
$∴$ Molecular weight of ${SO}_{2}$ gas = Vapour density of ${SO}_{2}$ gas x 2
Molecular weight of ${SO}_{2}$ = $(Mass of S + 2 mass of O)$
= {32 + (2 x 16)}
= 64 g
So, Vapour density of ${SO}_{2}$ gas = $\frac{M o l e c u l a r w e i g h t o f S O_{2} g a s}{2}$ = $\frac{64 g}{2}$ = 32 g
So, Vapour density of ${SO}_{2}$ gas is 32 g.

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Calculate the vapour density of SO2(O=16,S=32).

Calculate the vapour density of ${SO}_{2}$ $(O = 16, S = 32)$ .