Write down the ideal gas law

Calculate the volume in $f{t}^3$ of $10$lbmol of an ideal gas at $68F$ and $30$ psia.

A gas consists of $2\%N_2,79\%C{H}_4$ and $19\%C_2{H}_6$ at $120F$ and $13\mathrm{.}8$ psia.

a$.$ What is the partial pressure of each component?

b$.$ What is the volume fraction of each component?

What is the value of the ideal gas constant $R$ if the pressure is to be expressed in atm, the temperature in Kelvin, the volume in cubic feet and the quantity of material in pound moles.