В приведенных схемах расставьте коэффициенты и укажите тип реакции:

Cu + S = Cu2S
Zn(OH)2 = ZnO + H2O
MnO2 + Al = Al2O3 + Mn

Cu(OH)2 + H2SO4 = CuSO4 + H2O
Mg + H2O = MgO + H2
N2 + H2 = NH3
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