A definition of the kilogram by means of Avogadro number and dalton.

 

by Cesare Curti

 

 

 

Used symbols

 

 

 

Avogadro number ...

N

dalton .

kilodalton

u

Ku

gram ........

kilogram ..

g

Kg

carbon 12

mole

12C

mol

 

 

Definitions:

 

1)      The dalton is the twelfth part of the mass of an atom of 12C

2)      N = 6,02214199 1023

3)      1Kg = N Ku

 

 

From these definitions it comes down:

 

1)      1g = N u

2)      12g = N12u

3)      12 g of 12C contain N atoms of 12C

4)      The molar mass of 12C is 12 g mol-1

 

 

 


Bologna, sabato 5 luglio 2003

 

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