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

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Q. The density of $H_2S (mol. wt. = 34)\, at\, 27°C$ and 2 atm pressure is $(R = 0.0821\, L\, atm\, K^{-1} \, mol^{-1})$

JIPMERJIPMER 2014States of Matter

Solution:

$PV = \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 \times34}{0.0821\times300} $
$=\frac{68}{24.63}$
$=2.76 g/L$