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Discussion Response Post to: what is avogrado number?

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arun-rashi (1128)

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Mole in latin means heap,or a mass or pile.A mole of atoms is a collection of atoms whose total weight is the no of grammes equal to at. wt.As equal no of moles contain equal no of atoms it is convenient to express amt of elements in terms of moles .just as dozen means 12 score are 20 object,chemists defined mole as 'Definite number' of particles viz atoms, ions, electrons etc v

.This 'Definite number' was called Avagadro number,equal to 6.023x10²³(N ), in honour of Amadeo Avagadro.However for many years chemists used mole concept without knowing value of avagadro number thus 1 mole of H Atoms or 1mole of H molecules means avagadro number of H atoms or avagadro number of H molecules.The value of N depends upon at wt scale at present a mole is defined as amt of substance containg as many atoms or ions or any other elementary entities as there r C atoms in exactly 12 g of C-12.

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