Molar Mass

In chemistry, the molar mass is a physical property. It is defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.

As an example, the molar mass of water is approximately: M(H2O) ≈ 18 g·mol−1

Read more about Molar MassMolar Masses of Elements, Molar Masses of Compounds, Average Molar Mass of Mixtures, Related Quantities, Precision and Uncertainties, Measurement

Other articles related to "molar mass, molar, mass":

Mass Fraction (chemistry) - Related Quantities - Mole Fraction
... can be calculated using the formula where is the molar mass of the component and is the average molar mass of the mixture ... Replacing the expression of the molar mass produces ...
Absolute Molar Mass - History
... physical characteristics and their relation to the molar mass ... In order to gain information about a polydisperse mixture of molar masses, a method for separating the different sizes was developed ... time at which the samples eluted into a measurement of molar mass ...
Molar Mass - Measurement - Boiling-point Elevation
... If w represents the mass fraction of the solute in solution, and assuming no dissociation of the solute, the molar mass is given by ...
Molecular Mass - Related Quantities - Average Mass
... The average molecular mass (sometimes abbreviated as average mass) is another variation on the use of the term molecular mass ... The average molecular mass is the abundance weighted mean (average) of the molecular masses in a sample ... This is often closer to what is meant when "molecular mass" and "molar mass" are used synonymously and may have derived from shortening of this term ...
Molar Mass Distribution
... 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 polymer describes the relationship between the number of moles of each polymer species (Ni ... The molar mass distribution of a polymer may be modified by polymer fractionation ...

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