Show ever stepFor the mixture $n-$hexane, $n-$heptane and $n-$octane at $p=150$ kpa the vapor molar composition are $0\mathrm{.}5,0\mathrm{.}2,0\mathrm{.}3,$ Assuming ideal gas law at $500k.$ what will be molar$-$volume of the mixture $(R=8\mathrm{.}314\frac{j}{m}ol.k)$

a$)27.m\frac{m^3}{m}ol$

b$)r.V7\frac{m^3}{m}ol$

c$),.\mathrm{.}777\frac{m^3}{m}ol$

d$)0\mathrm{.}0277\frac{m^3}{m}ol$