KClO3->O2->SO2->SO3

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This is a series of chemical reactions that shows the decomposition of potassium chlorate (KClO3) into oxygen (O2), sulfur dioxide (SO2), and sulfur trioxide (SO3).

The balanced chemical equations for these reactions are as follows:

Decomposition of potassium chlorate:
2KClO3 → 2KCl + 3O2

Combustion of oxygen:
O2 + 2SO2 → 2SO3

Therefore, the overall reaction is:
2KClO3 → 2KCl + 3O2 → 2KCl + 3/2 O2 + 2SO2 → 2KCl + 2SO2 + 3/2 O2 → 2KCl + 2SO2 + 3/2 SO3

So, the given series of reactions shows the decomposition of potassium chlorate into oxygen, sulfur dioxide, and sulfur trioxide.