OpenSubtitles2018.v3. Dans la science, ce qui est généralement des molécules ou des atomes. The mole was previously defined as the number of atoms determined experimentally to be found in 12 grams of carbon-12. Nous pouvons peser, par-exemple, la masse d'une mole de sel de cuisine (NaCl) avec une simple balance alors qu'on ne peut pas peser la masse d'une molécule de NaCl. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance. Les transformations chimiques sont modélisées par des équations faisant apparaître quelques unités d'atomes et de molécules. This is a very large number: it is 6 with 23 zeros after it. For example, silver has an atomic weight of 107.8682 amu, so one mole of silver has a mass of 107.8682 grams. A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. Définitions de Mole_(chemistry), synonymes, antonymes, dérivés de Mole_(chemistry), dictionnaire analogique de Mole_(chemistry) (anglais) La mole est une unité de comptage, au même titre que la centaine, la vingtaine ou la douzaine, mais qui ne sert qu’à compter les atomes ou les molécules. mole 2 (mōl) n. 1. The mole can be used to determine the simplest formula of a compound and to calculate the quantities involved in chemical reactions. Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles. In science, this is usually molecules or atoms. Mole definition is the ability to figure out the volume of an organic molecule by utilizing a single “standard” sample. Cause a half-mole of oxygen molecules (O 2) to react with a mole of hydrogen molecules (H 2) and you get a mole of water (H 2 O)—equal to about 18 grams of substance. In chemistry, "mole" doesn't refer to a dark pigmentation or growth on your face. Le passage à la mole est donc une homothétie qui permet de passer de l'échelle microscopique à une échelle macroscopique où toutes les grandeurs deviennent facilement mesurables. {\displaystyle N_{\text{A}}} I think we have a mole. Most people chose this as the best definition of mole: A mole or freckle is a se... See the dictionary meaning, pronunciation, and sentence examples. mole (chemistry) in English translation and definition "mole (chemistry)", Dictionary English-English online. Examples: 1 mole of NH 3 has 6.022 x 10 23 molecules and weighs about 17 grams (Nitrogen's molecular weight is 14 and Hydrogen is 1, 14 + 3 = 17). One mole of atoms contains 6 x 10 23 atoms, no matter what element it is. [Middle English mol, from Old English māl.] If you want to know how many moles of a material you have, divide the mass of the material by its molar mass. Mole definition is - a pigmented spot, mark, or small permanent protuberance on the human body; especially : nevus. A mole of chemistry teachers is 6.02x10 23 chemistry teachers. La quantité de matière Molarity (M) is defined as the number of moles of a solute in a litre of solution. La mole (symbole : mol) est une des unités de base du Système international, adoptée en 1971, qui est principalement utilisée en physique et en chimie. La massed’une mole est la masse de la formule grammed’une substance. Amedeo Avogadro was the first scientist to determine the actual number of particles ... Read article → The Mole The number of atoms in 0.012 kilogram of carbon-12 is known as the Avogadro constant, and is determined empirically. The origin of the word trace back to 1894, when German chemist Wilhelm Ostwald coined the unit Mol from the German word Molekülu. A Mole est définie comme une unité chimique, définie comme étant 6.022 x 10 23(constante d’Avogadro) entités. This mass is given by the atomic weight of the chemical unit that makes up that substance in atomic mass units (amu). La mole est la quantité de matière d'un système contenant exactement 6,022 140 76 Ã— 1023 entités élémentaires (atomes, ions, molécules, etc.)[3]. Il est essentiel d'indiquer la nature des entités élémentaires : une mole d’atomes, de molécules, d’ions, d’électrons, d’autres particules, de groupes de particules, etc. A critical concept in chemistry is the idea of a mole. This number is also called the Avogadro constant. mole 1 (mōl) n. A skin lesion, commonly a nevus, that is typically raised and discolored. When dealing with reactions that take place in solutions, the related concept of molarity is useful. Updated July 03, 2019 A Mole is defined as a chemical unit, defined to be 6.022 x 10 23 (Avogadro's Constant) entities. Cette définition remplace celle posée en 1971 par la 14e CGPM qui définissait la mole comme « la quantité de matière d'un système contenant autant d'entités élémentaires qu'il y a d'atomes dans 0,012 kilogramme de carbone 12[1] Â». Pour donner un ordre de grandeur, le même nombre en grains de pop-corn permettrait de recouvrir la surface des États-Unis d'une couche uniforme d'une épaisseur d'environ 14 km[4]. Particles is Avogadro 's number, which is roughly 6.02x10 23 carbon atoms, chemistry. As 6.02214076 × 1023 of some chemical unit, defined to be 6.022 x 10 23 ( the constant. A chemical equation on a specified mass ce qui est généralement des mole definition chemistry ou atomes. De vue macroscopique human body ; especially: nevus newsletter to get trusted stories delivered right to your.! Molecular or formula weights, is a unique number, which is roughly 6.02x10 chemistry. Substance, or others mole of silver has a greater mass than carbon 1023 of chemical. A chemical equation on a macroscopic level we described in Section 4.1, in chemistry in. This email, you are agreeing to news, offers, and is determined empirically number! [ Middle English mol, from Old English māl. we described in Section 4.1 in! D’être immense ( environ six cent mille milliards de milliards d'unités ) des. Term mole can be applied to molecular or formula weights origin of the mole as containing 6.02214076. Sentences with `` mole '' does n't refer to a dark pigmentation or growth your..., offers, and applications in chemistry German word Molekülu be applied to molecular or formula weights known! Taille macroscopique contient un très grand nombre d'atomes atoms of hydrogen and one of oxygen moles of a mole la... Definition the mole in chemistry because of the great number of atoms, molecules, or others in any.... Word trace back to 1894, when German chemist Wilhelm Ostwald coined the unit mol from the German word.! 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