1) Fe->FeCl3->Fe2O3->Fe(NO3)3 2) Ca->CaO->CaCl2->Ca(OH)2->CaCl2

Question

1) Fe->FeCl3->Fe2O3->Fe(NO3)3

2) Ca->CaO->CaCl2->Ca(OH)2->CaCl2

Answer 1

Ca+H2O=CaO+H2
CaO+2HCl=CaCl2+H2O
CaCl2+2H2O=Ca (OH)2+2HCl
Ca (OH)2+2HCl=CaCl2+2H2O