2g of hydrogen is sealed in a vessel of volume 0.02 m3 and is maintained at 300K. Calculate the pressure in the vessel.
We know ideal gas equation
PV=nRT
Where V= volume of gas
R=gas constant
T=temperature
n=number of moles of gas
P=pressure of gas.
Given
Volume V=0.02 m3
Temperature T=300K
Mass of hydrogen gas = 2g
Number of moles n =
Molar mass of hydrogen=2amu
mol
From ideal gas equation, we can write
Pa
Pressure in the vessel is 
Pa.
1