Question

Pure hydrogen sulphide is stored in a tank of $100$ litre capacity at ${20}^{\circ }C$ and $2atm$ pressure.
The mass of the gas will be :

$[S=32,H=1]$.

• A. $34g$
• B. $340g$
• C. $282.4g$
• D. $28.24g$

Answer 1

The correct option is C $282.4g$

Here using ideal gas equation,

$given$ :

$V$= $100L$

$P=2atm$

$M\left(molarmass\right)=34g{mol}^{-1}$

$T=293K$

$R=0.0821Latm{mol}^{-1}{T}^{-1}$

$Solution$: $P\times V=n\times R\times T$

Therefore, $n$=$\frac{P\times V}{R\times T}$

Substituting the given values,

$n=8.31mol$

But, $n=\frac{M}{W}$

$W=8.31\times 34$

$W=282.54g$

Therefore, the correct option is C.