Question

The following chemical equation is not balanced: Fe2O3 + H2SO4 Fe2(SO4)3 + H2O When this chemical equation is correctly balanced, what is the coefficient of the water molecule? A. 1 B. 2 C. 3 D. 4

Answer 1

Answer: C. 3

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for the given reaction is:

$Fe_2O_3+3H_2SO_4\rightarrow Fe_2(SO_4)_3+3H_2O$

Thus the coefficient for water molecule is 3.

Answer 2

Fe₂O₃ + 3H₂SO₄ = Fe₂(SO₄)₃ + 3H₂O

c. 3