Составьте молекулярные уравнения реакций , выражаемых ионными уравнениями: 1) Zn+S=ZnS 2) Zn+2OH=Zn(OH)2 3). H+OH=H2O 4) Fe+3OH=Fe(OH)3 4) PbS+2H=H2S+Pb 5) Mg(OH)2+H=MgOH+H2O
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