A 4.022 g sample of oxalic acid, H2C2O4, is reacted with 35.00 mL of 2.40 M KOH according to the following unbalanced reaction. KOH(aq) + H2C2O4(s) ? K2C2O4(aq) + H2O(l) a) Calculate the theoretical yield of K2C2O4 in grams. b) If the % yield of the reaction is 82.4 %, what mass of K2C2O4 is isolated?