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Avagadros Number

المؤلف:  Professor John W. Norbury

المصدر:  ELEMENTARY MECHANICS & THERMODYNAMICS

الجزء والصفحة:  p 226

1-1-2017

2171

One mole is the number of atoms in a 12 gram sample of 12C, and this number is determine from experiment to be 6.02×10²³. This is often called Avagadro's number. The number of molecules must be the number of moles times the number of molecules per mole. Thus we write Avagadro's number as

and

where N is the number of molecules and n is the number of moles.