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Lorenzo Romano Amedeo Carlo Avogadro, Count of Quaregna and Cerreto [1] (/ ˌ æ v ə ˈ ɡ ɑː d r oʊ /, [2] also US: / ˌ ɑː v-/, [3] [4] [5] Italian: [ameˈdɛːo avoˈɡaːdro]; 9 August 1776 – 9 July 1856) was an Italian scientist, most noted for his contribution to molecular theory now known as Avogadro's law, which states that equal volumes of gases under the same conditions of ...
Amedeo Avogadro: 1776–1856 Italian: Avogadro constant: Michael Faraday: 1791–1867 British Faraday constant: Johann Josef Loschmidt: 1821–1895 Austrian: Loschmidt constant: Johann Jakob Balmer: 1825–1898 Swiss: Balmer's constant: Josef Stefan: 1835–1893 Slovene/Austrian: Stefan's constant [2] Ludwig Boltzmann: 1844–1906 Austrian ...
The Avogadro constant, commonly denoted N A [1] or L, [2] is an SI defining constant with an exact value of 6.022 140 76 × 10 23 mol −1 (reciprocal moles). [3] [4] It is this defined number of constituent particles (usually molecules, atoms, ions, or ion pairs—in general, entities) per mole and used as a normalization factor in relating the amount of substance, n(X), in a sample of a ...
Avogadro's hypothesis (as it was known originally) was formulated in the same spirit of earlier empirical gas laws like Boyle's law (1662), Charles's law (1787) and Gay-Lussac's law (1808).
Avogadro developed this hypothesis to reconcile Joseph Louis Gay-Lussac's 1808 law on volumes and combining gases with Dalton's 1803 atomic theory. The greatest difficulty Avogadro had to resolve was the huge confusion at that time regarding atoms and molecules—one of the most important contributions of Avogadro's work was clearly ...
[4] [25] Amedeo Avogadro did the opposite: he exclusively used the word "molecule" in his writings, eschewing the word "atom", instead using the term "elementary molecule". [26] Jöns Jacob Berzelius used the term "organic atoms" to refer to particles containing three or more elements, because he thought this only existed in organic compounds.
Avogadro's law, Avogadro's hypothesis, Avogadro's principle or Avogadro-Ampère's hypothesis is an experimental gas law which was hypothesized by Amedeo Avogadro in 1811. It related the volume of a gas to the amount of substance of gas present.
Avogadro is an Italian surname, derived from avogaro, a Venetian term for a diocese official (equivalent to avvocato, advocatus, "advocate").In 1389, bishop Nicolò Beruti, made the office of avogaro hereditary, and a number of noble families with the name Avogaro or Avogadro developed over the following centuries, in Brescia, Vercelli and Treviso.