It is believed that the reaction responsible for the depletion of ozone in the atmosphere is O3(g) + NO(g) + O2(g) + NO2(g) When 100.3 g of O3 reacts with excess NO, the actual yield of the product NO2 is 81.5 g. What is the % yield? Molar masses: O, 16.00 g/mol; N, 14.01 g/mol A. 84.8% B.75.1% C. 95.6% D. 96.1% E. 49.9% QUESTION 21 A sample of aluminum contains 2.91 x 1018 atoms of aluminum. What is the mass of this sample?