а) С->CO2->Na2CO3->NaHCO3->Na2CO3->Na2CO3 * 10H2O

b) C->CaC2->C2H2->CO2->MgCO3->Mg(HCO3)2

c) C->CH4->CO->CO2->Ca(HCO3)2->CaCO3->CO2->CO

 

Помогите пожалуйста!!!

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