weight-average molecular weight

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• Molecular mass — This article is about the mass of a single molecule. For the mass of a substance commonly used in basic stoichiometric calculations, see Molar mass. Assuming hydrogen and oxygen are standard weights in this image (as opposed to deuterium oxide)… …   Wikipedia

• molecular weight — n. the relative average weight of a molecule of a substance, expressed by a number equal to the sum of the atomic weights of all atoms in the molecule …   English World dictionary

• weight — The product of the force of gravity, defined internationally as 9.80665 m/s2, times the mass of the body. [A.S. gewiht] apothecaries w. an obsolescent system of weights based upon the w. of a grain of wheat. Has been used for centuries in… …   Medical dictionary

• molecular weight — Chem. the average weight of a molecule of an element or compound measured in units once based on the weight of one hydrogen atom taken as the standard or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon… …   Universalium

• molecular weight — molec′ular weight′ n. chem. 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 • Etymology:… …   From formal English to slang

• molecular weight — /məlɛkjələ ˈweɪt/ (say muhlekyuhluh wayt) noun the average weight of a molecule of an element or compound measured in units based on one twelfth of the weight of an atom of carbon 12; the sum of the atomic weights of all the atoms in a molecule …  

• molecular weight — noun Date: 1869 the average mass of a molecule of a compound compared to 1/12 the mass of carbon 12 and calculated as the sum of the atomic weights of the constituent atoms …   New Collegiate Dictionary

• Low molecular weight heparin — In medicine, low molecular weight heparin (LMWH) is a class of medication used as an anticoagulant in diseases that feature thrombosis, as well as for prophylaxis in situations that lead to a high risk of thrombosis.[1] Thrombotic disease or… …   Wikipedia

• Mass versus weight — The chains on the swing hold all the child’s weight. If one were to stand behind her at the bottom of the arc and try to stop her, one would be acting against her inertia, which arises purely from mass, not weight. In everyday usage, the mass of… …   Wikipedia

• Molar mass distribution — In linear polymers the individual polymer chains rarely have exactly the same degree of polymerization and molar mass, and there is always a distribution around an average value. The molar mass distribution (or molecular weight distribution) in a …   Wikipedia

• gas — gasless, adj. /gas/, n., pl. gases, v., gassed, gassing. n. 1. Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. 2. any such fluid or mixture of fluids. 3. any… …   Universalium