Potassium nitrate is widely used as a fertilizer because it provides two essential elements, potassium and nitrogen. It is made by mixing potassium chloride and nitric acid in the presence of oxygen according to the equation: 4KCl + 4HNO3 + O2 --> 4KNO3 + 2Cl2 + 2H2O a) How many grams of potassium nitrate, KNO3, will be produced from 50.0 g of potassium chloride and 50.0 g of nitric acid? b) Which reactant is the limiting reactant (LR)? c) An important by-product is chlorine. How many grams of chlorine will be produced? d) How much of the excess reactant is left over?