Допишіть формули продуктів реакцій, поставте коефіцієнти

a) Mg+ Cr(NO3)2= Cr(NO3)2 +_____;
б) ZnCl2+ AgNO3= Zn(NO3)2 +____;
в) FeSO4 + KOH = Fe(OH)2 +______;
г) K2SO4 + BaCl2 = KCI +_________;​
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