Question

A gas occupies $56\text{L}$ at 1 atm and $273\text{K}$. Find the number of moles of the gas:

• A. $2.5\text{moles}$
• B. $1.5\text{moles}$
• C. $4.3\text{moles}$
• D. $6.2\text{moles}$

Answer 1

The correct option is A $2.5\text{moles}$

Volume occupied by 1 mole of the gas at STP = $22.4\text{L}$
$56\text{L}$ will be occupied by $\frac{1}{22.4}\times 56=2.5moles.$