2.12) It is proposed to develop a fuel cell that runs directly opropane (C3H8g) at a propane stoichiometry (C,H,) of 2.5 and a cathode oxygen stoichiometry (2) of 2 [note the cathode is running on air (79% N₂, 21% O₂ by volume]. The cell operates at 0.3 V at a current density of 0.1 A/cm². The superficial active area of the cell is 25 cm². The anode electrochemical reaction is (CHg)g +6(H,O)g → 20H* + 20e + 3CO, The basic cathode electrochemical reaction is O₂+4e+4H2H₂O The balanced overall electrochemical reaction is thus (C3H8), +5024H₂O+3CO₂ with the following molecular weights: C3H8 44 g/mol H₂0 18 g/mol O₂ 32 g/mol air 28.85 g/mol CO₂ 28 g/mol (a) Is the overall cell producing or consuming water- at what rate in moles per second? (b) What is the actual supply rate of air at the cathode in grams per hour?