Question

When a mixture of KCIO and MnO2 is heated to 15.25 g, 4.4 g O is emitted. What amount

Has MnO2 been used as a catalyst? [K = 39, Cl = 35.5, 0 = 16]
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Answer 1

Answer:

When potassium chlorate (KClO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen gas. 

The balanced chemical equation is

2KClO3→Δ2KCl+3O2