Объяснение:
1) 4Fe + 3O2 = 2Fe2O3
2) 3Mg + 2H3PO4 = Mg3(PO4)2 +3H2
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Объяснение:
1) 4Fe + 3O2 = 2Fe2O3
2) 3Mg + 2H3PO4 = Mg3(PO4)2 +3H2