Balance the following equations?

Fe2O3 + 3H2 → 2Fe + 3H2O

4NH3 + 5O2  → 4NO + 6H2O

2Al + 6HAsO3  → 3H2 + 2Al(AsO3)3

4 answers

They all seem balanced to me.
Those look balanced to me.
they are not i have no idea where to start.
What are you talking about? Those equations are balanced.
Look at #1, for example.
Fe2O3 + 3H2 → 2Fe + 3H2O
I see 2 Fe on the left and 2 on the right.
I see 6 H on the left and 6 on the right.
I see 3 O on the left and 3 on the right. BALANCED.
The others are the same.