Question

Which of the following statements is correct about the given reaction : $4Fe_{(s)} + 3O_{(g)} \rightarrow 2Fe_{2}O_{3(g)}$

• A. Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product; therefore, it follows law of conservation of mass.

• B. Total mass of reactants = total mass of product; therefore, law of multiple proportions is followed.

• C. Amount of $Fe_{2}O_{3}$can be increased by taking any one of the reactants (iron or oxygen) in excess.
• D. Amount of $Fe_{2}O_{3}$produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.

Answer 1

Answer: (A)

Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product; therefore, it follows law of conservation of mass.

Answer 2

: According to law of conservation of mass, total mass of elements in reactants is equal to the total mass of elements in products.