Define the law of conservation of mass and law of constant proportion?
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Solution
Law of conservation of mass:
This law was given by Antoine Laurent Lavoisier.
According to this law, mass can neither be created nor be destroyed but can be transformed from one form to another.
This law also states that during the chemical reaction the total mass of reactants is equal to the total mass of products. This means the total mass before and after a chemical reaction remains constant.
Law of constant proportion:
This law was given by Proust.
According to this law in a chemical substance, the elements are always present in a fixed proportion by their mass.
For example, any water molecule is always made up of two hydrogen atoms and one oxygen atom in a ratio1:8.