Lập phương trình hóa học của các phản ứng sau và cho biết chúng thuộc loại phản ứng hóa học nào . a. Fe + O2 → Fe3O4 b. KNO3 → KNO2 + O2. c. Al + Cl2 → AlCl3 d. CaCO3 → CaO + CO2 e. P + O2 → P2O5 f. KClO3 → KCl + O2 g. Fe + HCl → FeCl2 + H2 h. KMnO4 → K2MnO4 + MnO2 + O2 i. CH4 + O2 → CO2 + H2O k.Mg + O2 --> MgO

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