Helium gas used in chemical synthesis is transferred from tanks under high pressure to reactor flasks at considerably lower pressure. If 0.5 g of He is introduced into a 4.8 L reaction flask at 125C, calculate: Gas a (kPa L2 mol ) b(L/mol) Gas a (kPa L2 mol-1) b(L/mol) He 3.46 0.0237 Cl2 657.9 0.0562 Ne 21.4 0.0171 CO2 364.0 0.0427 Ar 136.3 0.0322 H20 553.6 0.0305 H2 24.7 0.0266 NH3 422.5 0.0371 N2 140.8 0.0391 CH4 228.3 0.0428 O2 137.8 0.0318 C2H6 556.2 0.0638 CO 147.2 0.0395 CHO 1824 0.0115 F2 117.1 0.0290 HCI 370.0 0.0406 the pressure (in kPa) using the van der Waals equation. i kPa e Textbook and Media the pressure (in kPa) using the ideal gas equation. i kPa