Be sure to answer all parts. Complete the following statements for the complex ion [Co(en)2(H2O)CN]2 . (a) en is the abbreviation for (b) The oxidation number of Co is (c) The coordination number of Co is (d) segseg is a bidentate ligand. (en) Co(en)2 CN H2O

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180