27th October 2011 - 09:11 AM
Mole is a unit to measure amount of substance (also called chemical amount).
28th October 2011 - 04:21 AM
A mole is the amount of a substance that contains as many elementary entities (atoms, molecules or ions) as there are atoms in 0.012 kilogram (or 12 grams) of carbon-12, where the carbon-12 atoms are unbound, at rest and in their ground state.[
29th October 2011 - 05:48 AM
The number of entities per mole is known as the Avogadro constant, and is determined empirically. The currently accepted value is 6.02214179(30)×1023 mol−1 (2007 CODATA).
31st October 2011 - 02:58 AM
One way to understand the meaning of the term "mole" is to compare and contrast it to terms such as dozen.
31st October 2011 - 12:38 PM
Just as one dozen eggs contains 12 individual eggs, one mole contains 6.02214179(30)×1023 atoms, molecules or other particles.
1st November 2011 - 02:47 AM
The term is used because it is much easier to say, for example, 1 mole of carbon, than it is to say 6.02214179(30)×1023 carbon atoms, and because moles of chemicals represent a scale that is easy to experience.
2nd November 2011 - 02:55 AM
The amount of substance of a solute per volume of solution is known as amount of substance concentration, or molarity for short. Molarity is the quantity most commonly used to express the concentration of a solution in the chemical laboratory.
3rd November 2011 - 07:15 AM
The most commonly used units for molarity are mol/L (the official SI units are mol/m3).