For Avogadro's Number we have terms and definitions in 2 topics. The topics are Chemistry and Climatology.

6.02 x 1023, the number of molecules in 1 mole of a substance.
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The number of molecules in one mole of gas (6.022.169 X 1023 per mole). According to Avogadro's law, this number is a constant for permanent gases under normal conditions - that is, pressure of one standard atmosphere and temperature of 0°C (32°F) - the volume occupied by one mole of gas is the same for all permanent gases (22,421 cubic centimeters or 22.42 liters). Named for Amedo Avogadro (1776 -1856), an Italian chemist who identified this relationship.
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