Question

Mg → MgO → Mg(NO3)2 → Mg( OH)2 → MgCl2→ Mg(OH )2→ MgO​

Answer 1

2Mg+O2=2MgO

MgO+2HNO3=Mg(NO3)2+H2O

Mg(NO3)2+2NaOH=Mg(OH)2+2NaNO3

Mg(OH)2+2NaCl=MgCl2+2NaOH

MgCl2+2NaOH=Mg(OH)2+2NaCl

Mg(OH)2=MgO+H2O