A closed tank contains a $1kg($total mass$)$ of a vapour$-$liquid equilibrium mixture of Acetone $(C_3{H}_{6}O)$ with a quality of $)=(30\%.$ The temperature in the tank is $68C.$

a$)$ Calculate the volume fraction of acetone LIQUID in the tank $($i$.$e$.\frac{V_L}{V_{\text{t}\text{o}\text{t}\text{a}\text{l}}})$

You may make the following assumptions:

The liquid is incompressible. This means that its density does not change with pressure.

${}_l=735kg*m^{-3}at68C.$

The vapour phase behaves like an ideal gas.