(в) Расставьте коэффициенты в уравнениях:
А) HNO3 + CuO = Cu(NO3)2 + H2O

Б) H2SO4 + Fe2O3 = Fe2(SO4)3 + H2O

В) HBr + Ni(OH)2 = NiBr2 + H2O
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