WHAT IS THE LAW OF CONSTANT PROPORTIONS?
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In a chemical substance the element are always present in definite proportion by mass is called a law of constant proportion...hope its helpful..
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The Law of Constant Composition, discovered by Joseph Proust, is also known as the Law of Definite Proportions. It is different from the Law of Multiple Proportions although both stem from Lavoisier's Law of conservation of Mass. The French chemist Joseph Proust stated this law the following way: "A chemical compound always contains the same elements combined together in the same proportion by mass."
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