The balanced chemical equation shows a reaction between Iron (Fe) and oxygen (O2).

Question

4Fe+30₂→ 2Fe₂O₃

How does the equation show the law of conservation of mass?

(1 point)

The number of reactants is equal to the number of products

The sum of the coefficients and subscripts is the same on both sides

Each element has the same subscript or coefficient on each side

The number of atoms of each element is the same on both sides

Answer 1

The balanced chemical equation demonstrates the law of conservation of mass through the option:

The number of atoms of each element is the same on both sides.

In the reaction, you can count the number of atoms for each element:

• On the reactant side (4Fe + 3O₂), there are 4 iron (Fe) atoms and 6 oxygen (O) atoms.
• On the product side (2Fe₂O₃), there are also 4 iron (Fe) atoms and 6 oxygen (O) atoms.

This shows that the total mass of the reactants equals the total mass of the products, consistent with the law of conservation of mass.