Question

Осуществите цепочки превращений.
C => СO2 => Na2CO3 => BaCO3
P => P2O5 => H3PO4 => Ca3(PO4)2
Ca => CaO => Ca(OH)2 => CaCl2 => CaCO3
Zn => ZnO => Zn(NO3)2 => Zn(OH)2 => ZnCl2