Search results
Results From The WOW.Com Content Network
In chemistry, the molar mass (or molecular weight) ( M) of a chemical compound is defined as the ratio between the mass and the amount of substance (measured in moles) of any sample of the compound. [ 1] The molar mass is a bulk, not molecular, property of a substance. The molar mass is an average of many instances of the compound, which often ...
Molar volume. In chemistry and related fields, the molar volume, symbol Vm, [ 1] or of a substance is the ratio of the volume ( V) occupied by a substance to the amount of substance ( n ), usually at a given temperature and pressure. It is also equal to the molar mass ( M) divided by the mass density ( ρ ):
Molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a chemical species, in particular, of a solute in a solution, in terms of amount of substance per unit volume of solution. In chemistry, the most commonly used unit for molarity is the number of moles per liter ...
Molar mass distribution. In polymer chemistry, the molar mass distribution (or molecular weight distribution) describes the relationship between the number of moles of each polymer species ( Ni) and the molar mass ( Mi) of that species. [1] In linear polymers, the individual polymer chains rarely have exactly the same degree of polymerization ...
Mole fraction is numerically identical to the number fraction, which is defined as the number of particles ( molecules) of a constituent Ni divided by the total number of all molecules Ntot. Whereas mole fraction is a ratio of amounts to amounts (in units of moles per moles), molar concentration is a quotient of amount to volume (in units of ...
The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mol (g/mol). That makes the molar mass an average of many particles or molecules (potentially containing different isotopes), and the molecular mass the mass of one specific particle or molecule. The molar mass is ...
In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution. A commonly used unit for molality is the moles per kilogram (mol/kg). A solution of concentration 1 mol/kg is also sometimes denoted as 1 ...
The molar mass constant, usually denoted by Mu, is a physical constant defined as one twelfth of the molar mass of carbon-12: Mu = M ( 12 C)/12. [ 1] The molar mass of any element or compound is its relative atomic mass (atomic weight) or relative molecular mass (molecular weight) multiplied by the molar mass constant.