Search results
Results from the WOW.Com Content Network
The most common magnesium carbonate forms are the anhydrous salt called magnesite (MgCO 3), and the di, tri, and pentahydrates known as barringtonite (MgCO 3 ·2H 2 O), nesquehonite (MgCO 3 ·3H 2 O), and lansfordite (MgCO 3 ·5H 2 O), respectively. [6]
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Download as PDF; Printable version; In other projects Wikidata item; ... Molecular weight CAS No Helium-3: 3 He −269.96 N/A 3 14762-55-1 Helium-4: 4 He −268.928
Language links are at the top of the page. Search. Search
The terms "molecular mass", "molecular weight", and "molar mass" may be used interchangeably in less formal contexts where unit- and quantity-correctness is not needed. The molecular mass is more commonly used when referring to the mass of a single or specific well-defined molecule and less commonly than molecular weight when referring to a ...
Molecular weight (M.W.) (for molecular compounds) and formula weight (F.W.) (for non-molecular compounds), are older terms for what is now more correctly called the relative molar mass (M r). [8] This is a dimensionless quantity (i.e., a pure number, without units) equal to the molar mass divided by the molar mass constant .
Isotopically substituted molecules have higher mass. As a consequence, molecular vibration reduces and the molecule develops a lower zero point energy (see Kinetic isotope effect ). The abundances of certain bonds in certain molecules are sensitive to temperature at which it formed (e.g., abundance of 13 C 16 O 18 O in carbonates [ 29 ] as 13 C ...
The mass-average molecular mass, M w, is also related to the fractional monomer conversion, p, in step-growth polymerization (for the simplest case of linear polymers formed from two monomers in equimolar quantities) as per Carothers' equation: ¯ = + ¯ = (+), where M o is the molecular mass of the repeating unit.