12 thoughts on “Mole Conversions Tutorial: how to convert mole – mass, mole – particle, mass – particle problems

  1. Nice treatment of some very useful concepts for all chemists. I did a little research and discovered that the word "mole" comes from the German word for molecule which is "molekul" and was first used by the German chemist Wilhelm Ostald in 1902. As you note, it refers to a quantity of any discrete particles that is equal to Avogadro's number. It is not a mass although every mole of a different material has a unique mass.

    I noticed that in the periodic table you used, they gave the "average mass" of a mole of each element. That, of course, is determined by the particular percentages of isotopes of that element found on Earth. Recently, I Iearned that the periodic table we use on Earth would not be suitable for use on other planets. Apparently, the isotope ratios of the elements vary from planet to planet and that means each planet might need to have a table made specifically for that planet!

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