Question

$4.88g$ of $KCl{O}_3$ when heated produced $1.92g$ of $O_2$ and $2.96g$ of $KCl$ . Which of the following statements regarding the experiments is correct?

• A. The result illustrates the law of conservation of mass
• B. The result illustrates the law of multiple properties
• C. The result illustrates the law of constant proportion
• D. None of the above laws is followed

Answer 1

Answer: (A)

$\underset{4.88g}{2KCl{O}_3}\to \underset{2.96g}{2KCl}+\underset{1.92g}{3O_2}$
Since mass of the products (2.96 + 1.92) is equal to the mass of the reactant, this illustrates the law of conservation of mass.