Объяснение:
4Fe+3O2=2Fe2O3
2Ca+O2=2CaO
4P+5O2=2P2O5
2H2+O2=2H2O
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Объяснение:
4Fe+3O2=2Fe2O3
2Ca+O2=2CaO
4P+5O2=2P2O5
2H2+O2=2H2O