The Mole & Avogadro's Number


The Mole is a "counting word."  We use it like a "pair," or a "dozen" - but for a very large number of very small objects, like atoms, ions, and molecules.  Avogadro's Number is 6.02 x 1023, and is named after the great chemist Amedeo Avogadro.  

The Mole is used in a lot of conversion problems in chemistry.  If you are new to unit conversion, we have a separate set of videos to teach that topic. In this video, we work out two practice problems here in full.  If you need more examples for self-study, a practice test about the mole and molar mass with complete answer key is available for purchase in our store.

Video: The Mole and Avogadro’s Number

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Full-length Practice Tests with Answer Keys