Ammonia gas reacts with molecular oxygen gas

Ammonia gas reacts with molecular oxygen gas to form nitrogen monoxide gas and liquid water. Write the complete balanced reaction with all proper state symbols.

Solution:

Let us first write the chemical formulas.

NH_{3(g)}+O_{2(g)}\rightarrow NO_{(g)}+H_2O_{(l)}

Let us now balance this equation:

4NH_{3(g)}+5O_{2(g)}\rightarrow 4NO_{(g)}+6H_2O_{(l)}

This question can be found in General Chemistry, 9th edition, chapter 2, question 2.136