Question Detail
Question
When the equation NH₃ + O₂ = NO₂ + H₂O is balanced, the coefficient of O₂ is
Correct Answer
Option B is the correct answer.
Detailed Explanation
Balanced equation: 4NH₃ + 7O₂ → 4NO₂ + 6H₂O. The coefficient of O₂ is 7.
Hint
Balance atoms step by step: start with N, then H, then O.