Topic: Chemistry
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What is a Mole?
What is a Mole? It's not just a spot on your skin. In Chemistry, a mole is such a large quantity of atoms that it allows the atomic mass of an element to be measured weight (This also allows molecules to be measured in grams).
One mole of any substance contains Avogadros Number of molecules or atoms. Thats 6.02x1023 or 602000000000000000000000. The masses you see on periodic tables are in atomic mass units. One atomic mass unit is a very small amount 1 u 1.66053886 x 10-27 kg. If you have one moles worth of atomic mass units, youll have one gram. 1.66 x 10-27 kg   x   6.02x1023 = 1.00 gram Celebrating Mole Day Mole Day is Celebrated on October 23 every years.  It is supposed to be observed from 6:02 am to 6:02 pm. Why 6:02 and Why 10/23? It comes from Avogadros number. 6.02x1023 This number is so titled in honor of Amedeo Avogadro.
His main contribution to chemistry was his principle that: Equal volumes of all gases at the same temperature and pressure contain the same number of molecules. The work of Amedeo Avogadro was neglected until it was presented by Stanislao Cannizarro . He showed that Avogadros Principle could be used to determine not only molar masses, but also, indirectly, atomic masses How big is a Mole: If you were able to count at the rate of 1 million numbers a second, it would take about 20 billion years to count out one mole.
Source: www.exo.net
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