Question

Mg → MgO → Mg(NO3)2 → Mg(OH)2 → MgCl2 → MgCO3 → CO2 → KHCO3;

Answer 1

2Mg+O2=2MgO
MgO+2HNO3=Mg(NO3)2+H2O
Mg(NO3)2+2KOH=Mg(OH)2+K2NO3
Mg(OH)2+2NaCl=MgCl2+2NaOH
MgCl2+H2CO3=MgCO3+2HCl
MgCO3=разложение= MgO+CO2
CO2+KOH=KHCO3