Закончите уравнение реакции :
а) H2S+NaOH=?+?
б)H2S+CuSO4=CuS+?
в)H2S+Pb(NO3)2=PbS+?
г)AgNO3+H2S=Ag2S+?
д)Na2S+ZnCl2=ZnS+?
е)Na2S+FeSO4=FeS+?
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