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Proportion is a term usually used in mathematics. Proportion is when something is separated out and is part of a whole. It is a quantity that should be equal.
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Proportion is relation between two or more quantities. When it is said that x is proportional to y. X changes with respect to y. Proportion may be direct or inverse.
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The law of definite proportions is a law of chemistry. If a substance is pure then it will always have the same chemical make up and the same weight. This is also known as the law
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Dalton proposed that when elements combine they are in a ratio of small whole numbers. This is one of the simplest laws in chemistry yet easy to understand. You can find more information
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