(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 | the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions |
(chemistry) law stating that when two elements can combine to form more than one compound the amounts of one of them that combines with a fixed amount of the other will exhibit a simple multiple relation | the way two individuals relate to each other |
| the chemical composition and properties of a substance or object |