Question

Give the product of the following reaction :-
1)4Al+3O2-->
2)2Zn+3O2-->
3)4Fe+3O2-->​

Answer 1

Answer:

1)2Al2O3

2)2ZnO (I think the question is somewhat changed , the first reactant must be 2ZnS or 2Zn(NO3)2) otherwise answer would not be 2ZnO (please check)

3)2Fe2O3

These are obtained with the help of knowing the valencies of the elements present , their type of bonding and then finally balancing the equations.

Hope it helps you!

Thank you!