Question

What is law of chemical conservation of mass

and law of constant proportion?​

Answer 1

$\huge\dag$The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

$\huge\dag$The law of definite proportion, sometimes called Proust's law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio and does not depend on its source and method of preparation.

Answer 2

Answer:

The Law of Consevation of Mass states that in a chemical reaction , the mass of reactants and the product always remains the same .

The law of constant proportion states that the proportion of reactant always remains same for the product