Both gas A and Hydrogen (H2) gas have same volume at same pressure. Let both 's volume is V and pressure P. For gas A : Pressure =P Temperature(T)=300K Volume =V Mass =3g Molar mass =Mgm∕mol using ideal gas equation, PV=nRT ⇒PV=
3
M
×R×300....(1) For Hydrogen, Pressure =P Temperature (T)=200K Volume =V Mass =0.2g Molar mass =2gm∕mol Using ideal gas equation, PV=