Answer:
Fe2O3 + 3H2 -> 2Fe + 3H2O
It's a single displacement reaction.
Step-by-step explanation:
It's single displacement as only one group is being displaced which is the oxygen.
To balance it you can begin with the Oxygen as there are three of them in Fe2O3 and so there will be at least 3 water produced. There are 2 iron in the reactants so there will be 2 produced at least, and then to balance the hydrogen we just do 3*2 from the water and see that we need 6. Because it is H2, we only need 3H2.
Hope this helps!