Question Detail
Question
What is the coefficient of O₂ in the balanced reaction: 2KClO₃ → 2KCl + __ O₂?
Correct Answer
Option C is the correct answer.
Detailed Explanation
To balance the equation 2KClO₃ → 2KCl + ? O₂, count the oxygen atoms. On the left, 2KClO₃ contains 2 × 3 = 6 oxygen atoms. On the right, to have 6 oxygen atoms as O₂, we need 3 molecules of O₂.
Hint
Count the number of oxygen atoms on the left side. How many O₂ molecules are needed to have the same number of oxygen atoms?