Q. The volume of a gas at pressure $21 \times 10^{4}N/m^{2}$ and temperature $27℃$ is $83\ litres.$ If $R = 8.3\ J/mol\ K,$ then the quantity of gas in $g - mole$ will be
A) 15
B) 42
C) 7
D) 14
Explanation
(c) $PV = \mu RT \Rightarrow \mu = \frac{PV}{RT} = \frac{21 \times 10^{4} \times 83 \times 10^{- 3}}{8.3 \times 300} = 7$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.