а) Zn(NO₃)₂ = Zn²⁺ + 2NO³⁻
б) H₂S = H⁺ + HS⁻, HS⁻ = H⁺ + S²⁻
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а) Zn(NO₃)₂ = Zn²⁺ + 2NO³⁻
б) H₂S = H⁺ + HS⁻, HS⁻ = H⁺ + S²⁻
Б) 2H(+)+ S (2-)