gram molecule

American  

noun

Chemistry.

1. that quantity of a substance whose weight in grams is numerically equal to the molecular weight of the substance.

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gram molecule British  

/ ˌɡræmˈməʊlə /

noun

1. an amount of a compound equal to its molecular weight expressed in grams: now replaced by the mole See mole 4

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Other Word Forms

• gram-molar adjective
• gram-molecular adjective

Etymology

Origin of gram molecule

First recorded in 1890–95

Example Sentences

Ozone, to which we assign the formula O3, meaning that its molecule contains three atoms of oxygen, weighs fifty per cent more or 48 grams per gram molecule.

From Poisoned Air by Meek, S. P. (Sterner St. Paul)

Oxygen, to which we chemists assign the formula O2, meaning that its molecule consists of two atoms of oxygen, has a weight of 32 grams per gram molecule.

From Poisoned Air by Meek, S. P. (Sterner St. Paul)