Question

why it is necessary to balance the reactants and product?

Answer 1

it is necessary to balance them so as to the fact that matter can neither be created nor destroyed but can be changed from one form to other

Answer 2

heya @user

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To show the Law of conservation, it is necessary to balance reactants and products.

Law of conservation - the law of conservation  of mass states that mass can neither be created nor destroyed, hence it is necessary to balance the reactants and products

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