Final answer:
The coefficient in front of NO when the equation NH₃(g) + O₂(g) → NO(g) + H₂O(g) is balanced is 4.
Step-by-step explanation:
To answer the question: What is the coefficient in front of the NO when the equation below is balanced? NH₃(g) + O₂(g) → NO(g) + H₂O(g), we need to balance the chemical equation. The balanced chemical equation for the reaction between ammonia (NH₃) and oxygen (O₂) to produce nitrogen monoxide (NO) and water (H₂O) is: 4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(g). Therefore, the coefficient in front of NO (nitrogen monoxide) when the equation is balanced is 4.