1. Tardigrade
  2. Question
  3. Chemistry
  4. The density of an ideal gas at STP is 1.20 g L -1. The molecular mass of the gas is g mol -1.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The density of an ideal gas at STP is $1.20\, g\, L ^{-1}$. The molecular mass of the gas is ____ $g \,mol ^{-1}$.

States of Matter

Solution:

$d =\frac{ PM }{ RT }$
$M =\frac{ dRT }{ P }$
$=\frac{1.20 \times 0.0821 \times 273}{1}$
$=26.90\, g\, mol ^{-1}$