1) Mn (Vll) + O₂ = ? Помогите пожалуйста 2) NaOH+KOH=
3) Zn+Cu(No₃)₂=
4) Na₂O+H₂SO₄=
5) CaCO₃ --t°-->
6) SO₂+KOH=
7) Ca+KOH=
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