balance the equation: Fe + O2 yields Fe2O

Hey there!

Fe + O₂ → Fe₂O

Let's start by balancing the oxygen.

There are two on the left and one on the right, so let's add a coefficient of 2 in front of Fe₂O.

Fe + O₂ → 2Fe₂O

Now let's balance the iron.

There is one on the left and four on the right, so let's add a coefficient of 4 in front of Fe.

4Fe + O₂ → 2Fe₂O  

This is our final balanced equation.

Hope this helps!