Definitions for Daltons law
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The total pressure of a mixture or gases is the sum of the partial pressures of each gas in the mixture; it is only true for ideal gases.
When two elements can combine to form more than one compound then the amounts of one which combines with a fixed amount of the other will have a simple multiple relationship.
Origin: From John Dalton, English chemist
In chemistry and physics, Dalton's law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases. This empirical law was observed by John Dalton in 1801 and is related to the ideal gas laws.
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