Samples of groundwater were collected and analyzed using absorption spectrophotometry. The samples contained 100 ppm of Calcium and 80 ppm of Magnesium to give the total hardness of calcium carbonate. Express the total hardness of CaCO3 in parts per million.

Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product