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Q1. 10 grams of calcium carbonate (CaCO ₃) produces 3.8 grams of carbon dioxide (CO ₂) and 6.2 grams of calcium oxide (CaO). Represent this reaction in terms of law of conservation of mass.
Ans: According to law of conservation of mass:
Mass of reactants = Mass of products
∴ 10 gram of CaCO₃ = 3.8 grams of CO₂ + 6.2 grams of CaO
10 grams of reactant = 10 grams of products

Hence, it is proved that the law of conservation of mass is followed by the above reaction.

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Law of conservation of mass:
See how the mass of reactants equal to the mass of products.

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Law of conservation of mass:
What is the Law of Conservation of Mass?

The law of conservation of mass states that

“The mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another”.

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products