Question

Which of the following statements is correct about the reaction given below?
$4Fe (s) + 3O_2 (g) \longrightarrow 2Fe_2O_3 (g)$
(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 Fe₂O₃ can be increased by taking any one of the reactants (iron or oxygen) in excess.
(d) Amount of Fe₂O₃ produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.

Answer 1

Ans a) Total mass of iron and oxygen in reactants =total mass of iron and oxygen in products therefore it follows law of conservation of mass