Question

For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?
Responses

3mol Mg / 2 mol Fe
3mol Mg / 2 mol Fe

2 mol Mg/ 3 mol Fe
2 mol Mg/ 3 mol Fe

1 mol Fe/ 2 mol Fe
1 mol Fe/ 2 mol Fe

3 mol MgO / 2 mol Fe

Answer 1

To determine the ratio of moles of magnesium (Mg) to moles of iron (Fe) in the balanced reaction:

\[
3 \text{ Mg} + 1 \text{ Fe}_2\text{O}_3 \rightarrow 3 \text{ MgO} + 2 \text{ Fe}
\]

we can look at the coefficients from the balanced equation.

- There are 3 moles of Mg.
- There are 2 moles of Fe.

The ratio of moles of Mg to moles of Fe is therefore:

\[
\text{Ratio of moles of Mg to moles of Fe} = \frac{3 \text{ mol Mg}}{2 \text{ mol Fe}}
\]

So the correct response is:

**3 mol Mg / 2 mol Fe**