The density of H2S (mol. wt. = 34) at 27°C and 2 atm pressure is (R = 0.0821 L atm K-1 mol-1)

Question

The density of H2S (mol. wt. = 34) at 27°C and 2 atm pressure is (R = 0.0821 L atm K-1 mol-1) (A) 2.76 g/L (B) 27.6 g/L (C) 2.76 mg/L (D) none of these.

Tardigrade Admin · Accepted Answer

PV = (m/M)RT where m = mass of gas M = molecular mass of gas P =(m/V )×(RT/M)=d×(RT/M) So, d =(PM/RT) =(2 ×34/0.0821×300) =(68/24.63) =2.76 g/L

Q. The density of $H_{2} S (m o l . wt . = 34) a t 27° C$ and 2 atm pressure is $(R = 0.0821 L a t m K^{- 1} m o l^{- 1})$

$2.76 g / L$

$27.6 g / L$

$2.76 m g / L$

none of these.

$P V = \frac{m}{M} RT$
where $m$ = mass of gas
$M$ = molecular mass of gas
$P = \frac{m}{V} \times \frac{RT}{M} = d \times \frac{RT}{M}$
So, $d = \frac{PM}{RT}$
$= \frac{2 \times 34}{0.0821 \times 300}$
$= \frac{68}{24.63}$
$= 2.76 g / L$

Q. The density of H2​S(mol.wt.=34)at27°C and 2 atm pressure is (R=0.0821LatmK−1mol−1)

2.76g/L

27.6g/L

2.76mg/L