Question

how was avagadros number found​

Answer 1

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1909 Perrin reported an estimate of Avogadro's number based on his work on Brownian motion—the random movement of microscopic particles suspended in a liquid or gas. ... The best estimate of the charge on an electron based on modern experiments is 1.60217653 x 10-19 coulombs per electron

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Answer 2

THE NUMBER OF PARTICLES PRESENT IN 1 MOLE OF ANY SUBSTANCE IS FIXED THAT IS 6.022 × 10^23 . THIS IS CALLED AVOGADRO CONSTANT OR AVOGADRO NUMBER . THIS IS AN EXPERIMENTALLY OBTAINED VALUE AND IS NAMED IN HONOUR OF THE ITALIAN SCIENTIEST AMADEO AVOGADRO.

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