Science Source General Science

EN_90286235_0109

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One mole quantities of compounds. A mole is a chemical unit of measurement that shows the number of molecules or atoms present. One mole of any substance has the same number of chemical units, a vital concept in understanding chemical reactions and calculations. The mole was defined in 1971 in relation to the number of atoms in 12 grams of the most abundant isotope of carbon. This immensely large number (Avogadro's number) is over 600 billion trillion atoms, or a six followed by 23 zeros. All atomic weights are given relative to carbon's atomic weight of 12 grams per mole.

headline Science Source General Science

created date 2010-02-13

credit EAST NEWS

source Science Source

byline Charles D. Winters

original transmission reference 2m2260

weight 0,99MB

size 28cm x 19cm by 300dpi

keywords - Show

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