Question
Which of the following statements is correct about the given reaction : $$4F{e_{\left( s \right)}} + 3{O_{2\left( g \right)}} \to 2F{e_2}{O_{3\left( g \right)}}?$$
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 $$F{e_2}{O_3}$$ can be increased by taking anyone of the reactants ( iron or oxygen ) in excess.
D.
Amount of $$F{e_2}{O_3}$$ produced will decrease if the amount of anyone of the reactants ( iron or oxygen ) is taken in excess.
Answer :
Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product; therefore, it follows law of conservation of mass.
Solution :
According to law of conservation of mass, total mass of elements in reactants is equal to the total mass of elements in products.