What is a mole in chemistry?
The mole is the unit of measurement in the International System of Units (SI) for amount of substance. It is defined as the amount of a chemical substance that contains as many elementary entities, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (12C), the isotope of carbon with relative atomic mass 12 by definition. This number is expressed by the Avogadro constant, which has a value of 6.02214129(27)×1023 mol-1. The mole is one of the base units of the SI, and has the unit symbol mol.
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What are your thoughts on this subject?
24 Comments
Bari Cordia Federspiel
6.02 x 10 to the 23rd power is FOREVER ingrained in my mind, thanks to my beautiful, caring, intelligent Chinese chem study teacher in high school.
zolnem
Very important to teach chemistry to people.
Alex Markin
Obviously new chemistry. Using a name of a tunnelling mammal to change the spelling of mol sounds like newchem.
earlepg
Remembered that it was a unit of measurement, but of what? After 62 years, I have forgotten.
Joris van Pelt
Imperial or Metric?
michael d engels
Ah, high school chemistry. ;-)
Rafi Manory
This definition is very "flimsy" as the weight of the mole varies between substances according to their atomic weight.
filmnut
High School Chemistry !
Isabel Laing
Guesed correctly
Rob Bowman
It was a mol when I went to school
Sean Philips
Stephen Vilcko, that’s why it’s called trivia
ninakamwene
Mol NOT Mole I missed it because it was confusing.
Karen Mulhollem
guessed right but granddaughter helped (she's a Jr. in High School chemistry!)
Karin Johansson
Easy when you have studied it.
Marcella Kosse
Guessed correctly.
Leanna Greenbush
No idea. Guessed wrong.