Question

3.
The experimental determination of
Avogadro's number was facilitated
by:​

Answer 1

The best estimate of the charge on an electron based on modern experiments is 1.60217653 x 10-19 coulombs per electron. If you divide the charge on a mole of electrons by the charge on a single electron you obtain a value of Avogadro's number of 6.02214154 x 1023 particles per mole.

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Answer 2

Avogadro's number

Explanation:

• It can be determined by a number of ways but the physicist Jean Perrin estimated the value of Avogadro's number by working on Brownian motion.
• In simple terms, avogadro's number can be calculated simply by dividing charge on moles of an electron to charge on one electron that gives the value of around 6.023 $\times 10^{23}$ .
• In addition to this to experimentally estimate the value other methods are also used that includes,

1. By Loschmidt number
2. By counting alpha particles
3. By Black body radiation
4. By electrochemical method
5. By X-ray diffraction method.