№1

В схеме привращений веществом х2 является:
CaCo3->х1->х2 (t,+H2O)
а)CaO  б)Ca(OH)2 в)Ca(HCO3)2 г)CaH2
№2
СaCo3->x1->x2+NaCl (HCl,Na2Co3)
а)CaCO3б)CaClв)CaOг)Ca(OH)2

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