Question

The number of moles of $H_2$ in $0.224$ litre of hydrogen gas at STP ($273K,1$ atm) is :

• A. 0.1
• B. 0.01
• C. 0.001
• D. 1

Answer 1

Answer: (B)

$\because 22.4L$ of $H_2$ at STP = 1 mole of $H_2$
$\therefore 0.224L$ of $H_2$ at STP = $\frac{1}{22.4}\times 0.224$
$=0.01moles.$