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Q.
If the atomic mass of carbon was set at 100 u, what would be the value of Avogadro's number ?
Some Basic Concepts of Chemistry
Solution:
Mass of 1 atom of carbon $ \left(C^{12}\right)=\frac{12}{6.02\times10^{23} g}$
As the atomic mass of $C^{12}$ is $100\,u$ number of atoms present in $1 \,g $ atom or $100\, g$ is Avogadro’s number on this scale
$\therefore $ Avogadro’s number $=\frac{100}{12/ 6.02 \times 10^{23}}$
$=\frac{100\times6.02\times10^{23}}{12}$
$=5.01\times10^{24}$