1) The document discusses quantitative chemistry and limiting/excess reactants. It provides examples of calculations to determine the limiting reactant and amount of product formed based on the limiting reactant. 2) It also discusses percent yield calculations. For the example reaction of gold (III) chloride and lead, the theoretical yield of gold is calculated to be 9.09g based on the given amount of gold (III) chloride. 3) The actual yield obtained in the example is 1.05g gold. The percentage yield is calculated to be 11.6%, expressing the proportion of theoretical yield that was actually obtained.