Wednesday, October 23, 2013

Wondrous Words

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(Mole) is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as the amount of any substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with relative atomic mass 12. This corresponds to the Avogadro constant, which has a value of 6.02214129(27)×1023 elementary entities of the substance. It is one of the base units in the International System of Units, and has the unit symbol mol and corresponds with the dimension symbol N.[1] In honor of the unit, chemists often celebrate October 23 (a reference to the 1023 part of Avogadro's number) as "Mole Day".
Wikipedia  From Bing on October 23, 2013

8 comments:

  1. The only reason I knew that word was my son celebrated Mole Day when he took chemistry in high school. I really don't understand the word except that it's a unit of measurement.

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  2. I did not know mole as a unit of measurement, only as a small mammal. Thanks for sharing.

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  3. Chemistry memories are flooding back. I remember plugging mol into many equations! How interesting that today is Mole Day. Cool little piece of trivia. Thanks for sharing!

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  4. I think I'm reading too many thrillers. My first thought was that a mole had something to do with a spying operation. Glad to hear there is more than one definition.

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  5. One of my daughter's teachers was enlisting students to help make construction paper moles (the animal - because it isn't easy to depict it as a scientific measurement) to fill the room of a chemistry teaching colleague. I'm guessing that was going down today!

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  6. I only knew mole as an animal, interesting that it meant a unit of measurement.

    http://tributebooksmama.blogspot.com/2013/10/wondrous-words-wednesday_23.html

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  7. Love the date reference part of it! Never heard of this context. Thanks for the insight.

    Charlie
    Fur Earwig

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