formula weight

formula weight
1. (of a molecule) See molecular weight.
2. (of an ionic compound that does not form molecules) the sum of the atomic weights of the atoms of the formula unit.

* * *

Sum of the atomic weights of all atoms in a chemical formula.

The term is generally applied to a substance that consists of ions (see ionic bond) rather than individual molecules (and thus does not have a molecular weight). An example of such a substance is sodium chloride (table salt). Such a substance's chemical formula describes the simplest ratio of the number of atoms of the constituent elements. See also stoichiometry.

* * *

      in chemistry, the sum of the atomic weights of all atoms appearing in a given chemical formula. It is generally applied to a substance that does not consist of individual molecules, such as the ionic compound sodium chloride. Such a substance is customarily represented by a chemical formula that describes the simplest ratio of the number of atoms of the constituent elements, i.e., an empirical formula.

* * *


Universalium. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • formula weight — Chem. 1. (of a molecule) See molecular weight. 2. (of an ionic compound that does not form molecules) the sum of the atomic weights of the atoms of the formula unit …   Useful english dictionary

  • formula weight — noun Date: circa 1920 molecular weight used especially of ionic compounds …   New Collegiate Dictionary

  • formula weight —    The gram molecular weight of a substance …   Forensic science glossary

  • Weight — This article is about the physical concept. For other uses, see Weight (disambiguation). A spring scale measures the weight of an object (according to the operational definition) …   Wikipedia

  • formula — /fawr myeuh leuh/, n., pl. formulas, formulae / lee /. 1. a set form of words, as for stating or declaring something definitely or authoritatively, for indicating procedure to be followed, or for prescribed use on some ceremonial occasion. 2. any …   Universalium

  • weight — weighter, n. /wayt/, n. 1. the amount or quantity of heaviness or mass; amount a thing weighs. 2. Physics. the force that gravitation exerts upon a body, equal to the mass of the body times the local acceleration of gravity: commonly taken, in a… …   Universalium

  • Formula Ford — is a single seater, open wheel class in motorsport which exists in some form in many countries around the world. It is an entry level series to motor racing, in which in the past many drivers aspired to one day reach Formula One (today karting is …   Wikipedia

  • Formula Three — Formula Three, also called Formula 3 or F3, is a class of open wheel formula racing. The various championships held in Europe, Australia, South America, and Asia form an important step for many prospective Formula One drivers. Formula Three has… …   Wikipedia

  • Formula Renault — is a class of formula racing founded in 1971. [ [http://www.renault sport.com/fr/circuit/france 2000/presentation.php Présentation] (Presentation) from the French Championship] It is popular in Europe and other countries. Regarded as an entry… …   Wikipedia

  • Formula Junior — is a formula racing class first adopted in October 1958 by the CSI ( International Sporting Commission , the part of the FIA that then regulated motorsports). The class was intended to provide an entry level class where you could use inexpensive… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”