Translations for 'exemplify'. British English: exemplify VERB. If a person or thing exemplifies something, they are a typical example of it. The room's style exemplifies their ideal of 'beauty and practicality'. American English: exemplify. Brazilian Portuguese: exemplificar. Chinese: æ¯â¦çå¸è.
Law of multiple proportions. From Wikipedia, the free encyclopedia. In chemistry, the law of multiple proportions is one of the basic laws of stoichiometry used to establish the atomic theory, alongside the law of conservation of mass (matter) and the law of definite proportions.
Joseph Proust (1754-1826) proposed the the Law of Constant Composition in 1799. This law was very radical at the time and was hotly contested by Claude Berthollet (1748-1822). John Dalton (1776-1844) proposed the Law of Multiple Proportions. This law led directly to the proposal of the Atomic Theory in 1803. He also developed the concept of the mole and proposed a system of symbols to represent atoms of different elements. (The symbols currently used were developed by J.J. Berzelius(1779-1848)).