The reaction, 4Fe (s) + 3O2 (g) à 2 Fe2O3 (s), is the rusting of iron. What occurs as the reaction proceeds? a precipitate is formed the color of the solid will change a new odor is given off the solution bubbles

The reaction, 4Fe (s) + 3O2 (g) - > 2 Fe2O3 (s), is the rusting of iron. As the reaction proceeds, the color of the solid will change due to the reacction of iron with air. The rest of the choices do not answer the question above.