Ammonia can be prepared by reacting nitrogen gas, taken from the atmosphere with hydrogen gas. N2 + 3 H2 ---> 2NH3

When 75g of Nitrogen reacts with sufficient hydrogen, the theoretical yield of ammonia is 9.10g if the 1.72g of ammonia is obtained by experiment, what is percentage yield of the reaction?
a. 18.9% b. 2.29% c. 12.1% d 529%