Люди добрые, помогите решить уравнения реакций и выставить коэффиценты:
1) CuSO4 + Mg →

2) FeSO4 + NaOH →

3) K2S +HCl →

4) BaCl2 + K2SO4 →

5) Na2SO4 + Pb(NO3)2 →
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