The pressure specifications of a 250 liter tank recommend th…

The pressure specifications of a 250 liter tank recommend that the pressure in the tank should not exceed 20.0 atm.  Calculate the pressure in the tank if it contains 125.0 moles of chlorine gas at a temperature of 100.0 degrees Celsius.  Note: PV=nRT; K = C + 273.15; R = 0.08206 x L x atm