Question

Fe + O2 -> ?

KNO₃ -> KNO_{2 + ?}

Al + ? -> AlCl₃

Answer 1

3Fe+2O2----->Fe3O4

4KNO3------->4KNO2+2O2

2Al+3Cl2------>2AlCl3

Answer 2

4Fe + 3O2 -> 2Fe2O3

KNO3 -> KNO2 + 2O2

2Al + 3Cl2 -> 2AlCl3

Answer 3

3Fe + 2O₂ \(\underrightarrow{t^o}\) Fe₃O₄

2KNO₃ \(\underrightarrow{t^o}\) 2KNO₂ + O₂

2Al + 3Cl₂ ​\(\underrightarrow{t^o}\)​ 2AlCl₃