Дополните уравнения химических реакций. 1) __Zn + __O2 → __ZnO 2) __Cr + __ Cl2 → __ CrCl3 3) __Sb2O3 + __C → __Sb + __CO 4) __C + __F2 → __CF4 5) __Na + __N2 → __Na3N
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