Which of the following statements is correct about the reaction given below: `4Fe(s) +3O_(2)(g) rarr 2Fe_(2)O_(3)(g)`

Options

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

A

Explanation

According to the law of conservation of mass,
Total mass of reactants = Total mass of products
Amount of `Fe_(2) O_(3)` is decided by limiting reagent.