Q$5.$ A mixture of $H_2,N_2$ and $C{O}_2$ is contained in a storage tank of $1m^3$ capacity at $150C.$ Analysis revealed that the molar proportion of $H_2,N_2$ and $C{O}_2$ is $1$:$4$:$3.$ If the total pressure is $2$ atm $($guage$),$ calculate the average molecular weight and weight of $C{O}_2$ in $kg.$ If temperature of the tank is changed to $250C,$ calculate the ne$.$v voiume, new weight of $C{O}_2$ and new pressure reading on the Elunge. $(6$ miarks$)$