Question

The number of moles of a gas having a volume of 5 $L$ at 190 $torr$ and 27${}^{o}C$ is

• A. 0.033
• B. 0.051
• C. 1.01
• D. 2

Answer 1

The correct option is B 0.051

$n=\frac{PV}{RT}$

$P=\frac{190}{760}=0.25$

$n=\frac{0.25\times 5}{0.0821\times 300}$

$n=0.051$