Question

4.9 g of `KClO_(3)` when heated produced 1.92 g of oxygen and the residue of KCl left was found to weigh 2.96 g. Show that the data illustrates the law of conservation of mass.

Answer 1

`2KClO_(3)rarr2KCl+3O_(2)`
Mass of reactants =4.9 g , Mass of products `= (1.92 + 2.96) = 4.88 g`
As the mass of the products is nearly same as that of the reactants, this illustrates the Law of conservation of mass.