The First Step in the Ostwald Process for Producing Nitric

Multiple Choice

The first step in the Ostwald process for producing nitric acid is as follows: 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g) .
If the reaction of 15.0 g of ammonia with 15.0 g of oxygen gas yields 8.70 g of nitric oxide, what is the percent yield of this reaction?

A) 29.0%
B) 32.9%
C) 49.5%
D) 61.8%
E) 77.3%