Question

"Discuss al least three methods to deduce Avogadro's Number"

Answer 1

1.

Charge on one mole of electron 96,485.3383 coulombs per mole which is known as Faraday and charge on an electron is   based on modern experiments is 1.60217653 x 10^-19 coulombs per electron. If we divide the charge on a mole of electrons by the charge on a single electron you obtain a value of Avogadros number of 6.02214154 x 10²³ particles per mole.  

2.

Avogadros number can be determine using the careful measurements of the density of an ultrapure sample of a material on the macroscopic scale.We know the molecular weight (in g/mole) of that sample. The density of this material on the atomic scale is then measured by using x-ray diffraction techniques to determine the number of atoms per unit cell in the crystal and the distance between the equivalent points that define the unit cell. This methold gives number of atoms in one mole of material.

3.

If I have 12 grams of carbon-12 then it would have exactly Avogadro’s number of atoms in it.

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