Final answer:
The chemical reaction NH₃(g) + O₂(g) → NO(g) + H₂O(l) represents the oxidation of ammonia by oxygen.
Step-by-step explanation:
The chemical reaction represented by the equation NH₃(g) + O₂(g) → NO(g) + H₂O(l) is the oxidation of ammonia by oxygen. In this reaction, one molecule of ammonia (NH₃) reacts with one molecule of oxygen (O₂) to produce one molecule of nitric oxide (NO) and one molecule of water (H₂O). The reaction is balanced with a coefficient of 4 in front of NH₃ and O₂ to ensure that the number of atoms on both sides of the equation is equal.