Hoàn thành các PTHH: 1/ Al+ O2 --> Al2O3 2/ KClO3 --> KCl + O2 3/ CH4 + O2 --> CO2 + H2O 4/ KMnO4 --> K2MnO4 + MnO¬2 + O2 5/ Al(OH)3 --> Al2O3 + H2O

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