Укажите схему реакции замещения. А)H2O→H2+O2. B) Mg+O2→MgO. C) FeO+H2SO4→FeSO4+H2O. D) K+H2O→KOH+H2. E) CH4+H2O→CO+H2.Помогите пожалуйста..
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