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 why do we need to balance chemical equations

A reaction which has an equal number of atoms of all the elements on both sides of the chemical equation is called a balanced chemical equation.

The law of conservation of mass states that mass can neither be created nor destroyed. Hence, in a chemical reaction, the total mass of reactants should be equal to the total mass of the products. It means that the total number of atoms of each element should be equal on both sides of a chemical equation. Hence, it is for this reason that chemical equations should be balanced.

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to satisfy the law of conservation of mass

law of conservation of mass stated that= matter can neither be created nor be destroyed

in a chemical reaction the mass of products is equal to the mass of reactants..hence to satisfy this law we have to balance a chemical equation

by balancing chemical equaton...we are actually showing that atoms of the elements in reactants are not destroyed in chemical reaction..the same number of atoms are also present in the products

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Law  of conservation of mass states that mass can neither be created nor be destroyed in a chemical reaction.  It means that mass of the reactants shoud be equal to mass of products. That's we need to balance the equation.

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to make them stable 

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because according to the law of conservation of mass mass of reactants should be equal to the mass of products and thats what we do while balancing .

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