A new definition for the mole based on the Avogadro constant: a journey from physics to chemistry 来自 万方 喜欢 0 阅读量: 29 作者:Milton,M. J. T. 摘要: The mole is the most recent addition to the set of base units that form the International System of Units, although its pre-...
Mole, standard unit (6.02214076 x 10^23) in chemistry for measuring large quantities of very small entities such as atoms, molecules, or other specified particles. The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s const
Thedimensionsof the universal gas constantRareenergyper degree per mole. In the metre-kilogram-second system, the value ofRis 8.31446261815324joulesperkelvin(K) per mole. The universal gas constant is defined asAvogadro’s numberNAtimes theBoltzmann constantk. ...
Themolecular weightof a molecule is the sum of theatomic weightsof its component atoms. If a substance has molecular weightM, thenMgramsof the substance is termed onemole. The number of molecules in one mole is the same for all substances; this number is known asAvogadro’s number(6.022140...
(this is called the molar mass) and represents 6.022140857 × 1023atoms (Avogadro’s number). One mole of iron contains 55.847 grams; one mole of methane contains 16.043 grams; one mole of molecular oxygen is equivalent to 31.999 grams; and one mole of water is 18.015 grams. Each of ...
The ideal gas law may be written in a form applicable to any gas, according to Avogadro’s law, if the constant specifying the quantity of gas is expressed in terms of the number of molecules of gas. This is done by using as the mass unit the gram-mole; i.e., the molecular weight...