EXPLAIN THE LAW OF CONSERVATION OF MASS WITH AN EXAMPLE ?

The law of conservation of mass states that the mass of a closed system will remain constant in a chemical reaction. In other words, mass can neither be created nor destroyed in a chemical reaction. This law was first formulated by Antoine Laurent Lavoisier in 1789.

For example: When 100g of mercuric oxide is heated, 92.6 g of mercury and 7.4 g of oxygen are obtained as products.

i.e. HgO→ Hg + O2

In this case mass of reactant =100g

Mass of products = Mass of Hg + Mass of O2 = 92.6 + 7.4 = 100g

Thus, we obtain Mass of product = Mass of reactants

This verifies the law of conservation of mass.

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