Using the Van Der Waals Equation, the Pressure in a 22.4

Using the van der Waals equation, the pressure in a 22.4 L vessel containing 1.00 mol of neon gas at 100°C is __________ atm. (a = 0.211 L²-atm/mol², b = 0.0171 L/mol)

A) 0.730
B) 1.00
C) 1.21
D) 1.37
E) 0.367