Please help me write these two balanced equations.

Question

Dissolution of rust, Fe2O3, by sulfuric acid.

and

Ammonium nitrite reacts with oxygen to form ammonium nitrate.

Any help would be awesome, thankyou.

Answer 1

I think I got the answer for the second one

ammonium nitrite reacts with oxygen to form ammonium nitrate:

2NH4NO2+O2=2NH4NO5

Answer 2

OK except NH4NO5 is not ammonium nitrate. That's NH4NO3.
2NH4NO2 + O2 ==> 2NH4NO3

Fe2O3 + 3H2SO4 ==> Fe2(SO4)3 + 3H2O