Question

How many moles of helium gas occupies $22.4$ litre at $0^{o}C$ and $1$ atmosphere?

• A. $0.90$
• B. $1.0$
• C. $1.10$
• D. $0.11$

Answer 1

The correct option is B $1.0$

$pV=nRT$
$n=\frac{p.V}{R.T}$
$n=\frac{\left(1atm\right).\left(22.4L\right)}{\left(0.082Latm/moleK\right).\left(273K\right)}$
$n=1mole$

Hence, answer is option B