Question

Which equation below best describes the law of conservation of mass? A. 2Fe + 3O2 → 2Fe2O3 B. 4Fe + O2 → 2Fe2O3 C. Fe + O2 → Fe2O2 D. 4Fe + 3O2 → 2Fe2O3

Answer 1

I think the correct answer from the choices listed above is option D. The equation that describes correctly the law of conservation of mass is expressed as:

4Fe + 3O2 → 2Fe2O3

This is because the amount of the elements in the reactants is equal to the product side.