To demonstrates that matter is neither created nor destroyed in the chemical reaction the number of atoms or masses in the reactant sides must be equal to the number of atoms or masses of the product side.
The law of conservation of masses states that masses are neither created nor destroyed but can be transformed from one form to another.
In a chemical reaction, it simply means the masses of the reactant will be equal to the masses of the product.
For a chemical equation to obey law of conservation of mass, the equation must be balanced. Therefore,
Mg(OH)₂ + 2HNO₃ → Mg(NO₃)₂ + 2H₂O
Therefore, to demonstrates that matter is neither created nor destroyed in the chemical reaction the number of atoms or masses in the reactant sides must be equal to the number of atoms or masses of the product side.
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