Question

$4.88g$ of $KClO_{3}$ 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)

$\underset{4.88 g}{2 K C l O_{3}} \rightarrow \underset{2.96 g}{2 K C l}+\underset{1.92 g}{3 O_{2}}$
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.