Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is
According to ideal gas equation, we have Pressure,p=ρRT/M, where M is molecular weight of ideal gas.
Where,R and T are constants
=>MA/MB=ρA/ρB x pB/pA
=1.5 x 1/2