Definite Proportion Prousts Law

Law of Definife Proportion is one of the basic chemical laws. It states that Elements of a compound are combined in definite proportion by mass. For example, the mass ratio between hydrogen and oxygen in water is 1/8. This means that 1 amu of H always combines with 8 amu of O atom to form H2O molecule. 

The mass ratio --in a compound is —. How many grams of X and O should 

According to the given ratio, 1 g X and 2 g O form a 3 g compound. Then, 

Proust was a French scientist. He is accepted as the first scientist to propose the Law of Definite Proportion in 1792. 

Law of Definite Proponion is also known as the Law of Definite Composition or the Law of Constant Composition . 

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