<p>Amount of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>F</mi><msub><mi>e</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></math>&nbsp;produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.</p>