TERMIUM Plus®

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GRAM MOLECULAR WEIGHT [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-10-11

English

Subject field(s)
  • Metrology and Units of Measure
  • Analytical Chemistry
Universal entry(ies)
mol
symbol
DEF

The amount of substance of a system which contain as many elementary entities as there are atoms in 0.012 kilogram of carbon-12 (i.e., 6.023 X 1023).

CONT

For example, NaCl has a formula weight of 58.5 (Na, 23, and chlorine, 35.5). One mole of NaCl is 58.5 g.

OBS

Formerly, the connotation of "mole" was "gram molecular weight". Current usage tends to apply the term "mole" to an amount containing Avogadro's number of whatever units are being considered. Thus, it is possible to have a mole of atoms, ions, radicals, electrons, or quanta. This usage makes unnecessary such terms as "gram-atom", "gram-formula weight", etc.

OBS

When the mole is used, the elementary entities must be specified and may be atoms, molecules, ions, electrons, other particles or specified groups of such particles.

OBS

mole; mol: terms and definition officially approved by the International Civil Aviation Organization (ICAO).

Key term(s)
  • gram-molecule
  • gram molecule
  • gramme-molecule
  • gramme molecular weight

French

Domaine(s)
  • Unités de mesure et métrologie
  • Chimie analytique
Entrée(s) universelle(s)
mol
symbol
DEF

Quantité de matière d'un système contenant autant d'entités élémentaires qu'il y a d'atomes dans 0,012 kilogramme de carbone 12.

OBS

Quand on utilise la mole, il est nécessaire que soit bien précisée [...] la nature des particules concernées. On dira, par exemple : une mole de gaz ammoniac [...], une mole d'ions hydrogène [...], etc. La mole est [...] d'un emploi très général, elle rend inutile, en particulier, l'emploi des expressions «molécule-gramme» et «atome-gramme», qui deviennent la masse de 1 mole.

OBS

Lorsqu'on emploie la mole, les entités élémentaires doivent être spécifiées et peuvent être des atomes, des molécules, des ions, des électrons, d'autres particules ou des groupements spécifiés de ces particules.

OBS

mole; mol : termes et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
  • Química analítica
Entrada(s) universal(es)
mol
symbol
DEF

Cantidad de sustancia de un sistema que contiene tantas entidades elementales como átomos existen en 0,012 Kg de carbono-12.

OBS

Cuando se emplea el mol, deben especificarse las entidades elementales, que pueden ser átomos, moléculas, iones, electrones, otras partículas o grupos especificados de tales partículas.

OBS

plural: moles, moléculas-gramo.

OBS

mol: término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

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