Встановiть тип рiвняння реакцiй:
3Fe + 2O2 = Fe3O4

BaO + H2O = Ba(OH)2

2Na + 2H2O = 2NaOH + H2

2KMnO4 = K2MnO4 + MnO2 + O2
2H2O2 = 2H2O + O2
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