The first step in the Ostwald process for producing nitric acid is the reaction, 4NH3(g)+ 5O2(g) = 4NO(g)+ 6H2O(g). If the reaction of 150. g of ammonia with excess oxygen gas yields 87. g of nitric oxide (NO), the percent yield of this reaction is  A. 100%  B. 49%  C. 77%  D. 33%  E. 62%

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