Chemistry Stoichiometry Solution: When heated, KClO3 decomposes into KCl and O2.2KCl...

Solution: When heated, KClO3 decomposes into KCl and O2.2KClO3 → 2KCl +3O2 If this reaction produced 42.0 g of KCl, how much O 2 was produced (in grams)?