7. The van der Waals equation gives a relationship between the pressure p

(atm), volume V (L), and temperature T (K) for a real gas where n is the number of moles, (L atm)/(mol K) is the gas constant, and a (L2 atm/mol2) and b (L/mol) are material constants.
Determine the volume of 1.5 mol of nitrogen ( L2 atm/mol2, L/mol) at temperature of 350 K and pressure of 70 atm.