Question #22533

If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant
would be?

Expert's answer

The Avogadro constant enters into the definition ofthe unified atomic mass unit, u,

1 u = Mu / Na = 1,6605 * 10^-24

where Mu is the molar mass constant and Na is Avogadro constant.

Mu = Mw / Ar

If Mw= 24 amu

Mu = 24 amu / 12 = 2

Na' = Mu / 1,6605 * 10^-24 = 2 / 1,6605 * 10^-24 = 1,2

* 10^24

This is " new" Avogadro constant = 1,2 * 10^24

1 u = Mu / Na = 1,6605 * 10^-24

where Mu is the molar mass constant and Na is Avogadro constant.

Mu = Mw / Ar

If Mw= 24 amu

Mu = 24 amu / 12 = 2

Na' = Mu / 1,6605 * 10^-24 = 2 / 1,6605 * 10^-24 = 1,2

* 10^24

This is " new" Avogadro constant = 1,2 * 10^24

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