Воспроизведение уравнения химических рекций по приведенным фрагментам:
а)Mg+H2SO4 -->...+H2
б)Fe+...-->FeCl2+H2
в)Ni+..-->NiSO4+H2
г)MgO+H2SO4-->...+H2O
д)Li2O+HBr-->LiBr+...
e)Al+HBr-->AlBr3+..
ж)Mg+H3PO4-->...+Mg3(PO4)2
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