Question

What is the mole ratio of `Fe_3O_4` to `Fe` in the equation `3Fe + 4H_2O -> Fe_3O_4 + 4H_2`?

Answer 1

`(Fe_3O_4)/(Fe)` is equal to
`(1 mol)/(3 mol)`

Explanation:

1. To determine the mole ratio of chemical equations, generally is to make sure that the equation is balanced following the Law of the Conservation of Mass;
2. Since the problem presents a balanced equation, all you have to do is to identify which compounds involved to get the right mole ratio;
3. The number in front of each compound/element are called coefficients which also serves as the number of moles of the elements/compounds present in the chemical equation;
4. The balanced equation has the following number of moles
   `3 mol Fe`
   `4 mol H_2O`
   `1 mol Fe_2O_4`
   `4 mol H_2`
5. Therefore; the mole ratio is `(1 mol Fe_2O_4)/(3 mol Fe)`