A storage tank 3.0 m tall is used to store toluene. The liquid height in the tank is 2.0 m and the contents are at 20 C. As liquid toluene is withdrawn from a storage tank, nitrogen is fed to the head space to keep the pressure at 1.0 atm in the tank. When the tank is refilled with toluene, gas from the head space is allowed to leave to keep the pressure at 1.0 atm in the tank.

a)Select all TRUE statements

b)What is the mole fraction of toluene in the liquid phase in the tank?

c)What is the mole fraction of toluene in the vapor phase in the tank?

d)What is the mole fraction of nitrogen in the vapor phase in the tank?