law of partial pressures
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|Noun||1.||law of partial pressures - (chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature|
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions