molecular weight

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molecular weight

n.
The sum of the atomic weights of all the atoms in a molecule. Also called relative molecular mass.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

molecular weight

n
(Chemistry) the former name for relative molecular mass
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

molec′ular weight′


n.
the average weight of a molecule of an element or compound measured in units based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbr.: mol. wt.
[1875–80]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

molecular weight

The sum of the atomic weights of the atoms contained in a molecule. For example, since the atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16, the molecular weight of water (H2O) is 1 + 1 + 16, or 18.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.molecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a moleculemolecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
mass - the property of a body that causes it to have weight in a gravitational field
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
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References in periodicals archive ?
The typical process for the polymerization to give MPEG-b-poly([epsilon]-caprolactone-ran-L-lactide) (MPEG-PCLA, P[C.sub.5][L.sub.5]) with PCL/PLLA (molecular weight ratio, 1200/1200 g/mol) is as follows: MPEG ([M.sub.n] = 750 g/mol) (3 g, 4 mmol) and toluene (80 mL) were introduced into a flask.
In addition, the weight average molecular weight ratio of the add blend to the transesterification blend was found to be significantly larger if the initial blending molecular weights were significantly different from one another.
r volume ratio r = [V.sub.2]/[V.sub.1] r[prime] molecular weight ratio r[prime] = [Mw.sub.2]/[Mw.sub.1] 3,(silane) In the binary n = 3, and component 1 (A) is silane W 3,(silane) The value of W, together with the above information.

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