Question

Fe2O3 + 3 CO → Fe + 3 CO2

Which element(s) are not balanced in this equation?

I will give medal and fan! Help!!

Answer 1

What is oxidation number of Fe on the left? and the oxidation number of Fe on the right?

Answer 2

There are 2 Fe atoms on the left, and 1 Fe atom on the right
There are 6 O atoms on the left, and 6 O atoms on the right
There are 3 C atoms on the left, and 3 C atoms on the right

If you do this, you can see what elements are not balanced and what you might need to add.

Therefore, Fe is the element that is not balanced. To balance it you would need to put a '2' in front of the Fe on the right.

Answer 3

I hope this can help for future questions :)