29.Determine the number of water molecules necessary to balance the following chemical equation. (A) 3 (B) 5 (C) 7 (D) 14

33.At a certain temperature, Kc equals 1.4 x 102 for the reaction:2CO(g)+O2(g)⇌2 CO2(g) If a 2.50-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium, how many moles of CO are also present in the flask? (A) 0.422 mol (B) 0.169 mol (C) 0.107 mol (D) 0.0114mol