Chemical oxygen production should be complete and good

1. Manganese dioxide
Text expression: hydrogen peroxide (hydrogen peroxide) - -------- - → water + oxygen
MnO2
Symbol expression: H202 ---------- → H2O + O2 ↑
2. △ (symbol of heating)
Text expression: potassium permanganate -------- --- potassium permanganate + manganese dioxide + oxygen
△
Symbol expression: KMnO4 -------- → k2mno2 + MnO2 + O2 ↑
three
manganese dioxide
Text expression: potassium chlorate -------- → potassium chloride + oxygen
△
MnO2
Symbol expression: KClO3 -------- → KCl + O2 ↑
△
(attachment: when writing symbolic expressions, the numbers are reduced. Because it's not easy to type, I didn't type them according to the standard writing method. Please forgive me
These are all decomposition reactions

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