Work on the following problems using the generalized Z-charts from the class notes: a) Calculate the mass of ethane contained in a 0.5 ft3 vessel at 140 F and 2000 psia. b) If 10 pounds mass of ethane is contained in a 0.5 ft3 vessel, at what temperature does it exert a pressure of 3000 psia? c) To what pressure does one fill a 0.1 m3 vessel at 25 C in order to store 25 kg of ethylene in it?