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单词 gram molecule
释义

gram molecule


gram molecule

or

gram-molecular weight

n (Units) an amount of a compound equal to its molecular weight expressed in grams: now replaced by the mole. See mole4 ˌgram-moˈlecular, gram-molar adj

mole1

(moʊl)

n. 1. any of various small, insect-eating mammals, esp. of the family Talpidae, living chiefly underground and having velvety fur, very small eyes, and strong forefeet. 2. a spy who becomes part of and works from within the ranks of an enemy governmental staff or intelligence agency. 3. a large, powerful machine used in the construction of tunnels. [1350–1400; Middle English molle; akin to Middle Dutch, Middle Low German mol]

mole2

(moʊl)

n. a small, congenital spot or blemish on the human skin, usu. of a dark color, slightly elevated, and sometimes hairy; nevus. [before 1000; Old English māl; c. Old High German meil spot, Gothic mail wrinkle]

mole3

(moʊl)

n. 1. a massive structure, esp. of stone, set up in the water, as for a breakwater or a pier. 2. an anchorage or harbor protected by such a structure. [1540–50; < Latin mōlēs mass, dam, mole]

mole4

or mol

(moʊl)

n. the quantity of a substance the weight of which equals the substance's molecular weight expressed in grams, and which contains 6.02 x 1023 molecules of the substance. [< German Mol (1900), short for Molekül molecule]

mole5

(moʊl)

n. a mass in the uterus formed by malformed embryonic or placental tissue. [1605–15; < New Latin mola millstone]

mo•le6

(ˈmoʊ leɪ)

n. a spicy Mexican sauce made with chocolate and chili peppers. [1925–30; < Mexican Spanish < Nahuatl mōlli sauce]
Thesaurus
Noun1.gram molecule - the molecular weight of a substance expressed in gramsgram molecule - the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unitesmol, molemetric weight unit, weight unit - a decimal unit of weight based on the gram

Gram Molecule


Gram Molecule

 

(or mole), the number of grams of a simple or complex chemical compound equal to its molecular weight. Thus, if the molecular weights of nitrogen N2 and sulfuric acid H2SO4 are 28.0134 and 98.078. respectively, their gram molecules are equal to 28.0134 g and 98.078 g. For ease in computation, the value of the gram molecule is rounded off to the nearest gram. The number of molecules in one gram molecule of any substance is the same and is equal to Avogadro’s number, that is. 6.02252 х 1023. The gram molecule of any substance in the ideal gas state at standard conditions (a temperature of 0°C and a pressure of 101,325 newtons/m2 [760 mm Hg]) occupies approximately the same volume, which equals 22.4 liters. Based on this relation, the volume of any amount of gas of known molecular formula can be easily computed. Thus. 66 g of C02 (molecular weight 44) is 1.5 gram molecules, and consequently at standard conditions it occupies a volume of 22.4 liters х 1.5 = 33.6 liters. It is conventional also to speak of the gram molecule of a mixture: thus the gram molecule of air is taken to be equal to 29 g.

The concept of gram molecule, as well as of kilogram molecule and ton molecule, is widely used in various computations in chemistry, physics, and engineering.

gram molecule


gram molecule

The weight (mass) in grams of a substance equal to its molecular weight (mass) .

gram molecule


  • noun

Synonyms for gram molecule

noun the molecular weight of a substance expressed in grams

Synonyms

  • mol
  • mole

Related Words

  • metric weight unit
  • weight unit
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更新时间：2025/2/5 23:31:49