Расставте коэффициенты и укажите тип хим.реакции пжлст
1)P2O5+H2O-H3PO4
2)KBr+Cl2-KCl+Br2
3)Fe2O3+H2-Fe+H2O
4)KCl3-KCl-CuCl2+H2O
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