J.R. S. answered 07/03/21
Ph.D. University Professor with 10+ years Tutoring Experience
2KClO3 → 2KCl + 3O2 ... balanced equation
2 mols KClO3 produces 3 mols O2. Use this mole ratio relationship to answer the question.
6.0 mols KClO3 x 3 mols O2 / 2 mols KClO3 = 9 mols O2