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what is Avagadro's number?
Avagadro's number is the number of objects in one mole of that thing Na = 6.0221023 A mole of hydrogen atoms contains 6.0221023 atoms, a mole of sugar molecules contains 6.0221023 molecules, a mole of StarWars figures has 6.0221023 figures. While the latter might seem to be appoximately the number of Phantom Menace toys sold in the first week of availability, a real mole of toys would take up something on the order of 1% of the volume of the Earth. A mole is a very large number.
http://www.cartage.org.lb/en/themes/sciences/Chemistry/Miscellenous/Helpfile/Stoichiometry/Avagadros.htm