kaw of definite propotion
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Law of definite proportions
In chemistry, the law of definite proportion, sometimes called Proust's law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio and does not depend on its source and method of preparation.
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The law states that in a chemical substances the elements are always present in a definite proportion by mass. It is also termed as law of definite proportion. For instance, the ratio of hydrogen and oxygen in water obtained from any source is 1:8 i.e. 1g of hydrogen and 8g of oxygen together make up 9g of water.
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