Why Avogadro chose exactly 6.022 *10*23 as equal to 1 mole?

1.	Why Avogadro chose exactly 6.022 1023 as equal to 1 mole?
Answer» Eg of water:When Avogadro took 6.022*10^23 molecules of water,it weighed exactly 18g ie,the molecular mass of water.So avogadro number of any atoms/molecules/ions etc were called 1 mole and hence 18g of water=1 mole

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