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 10^23, and is named after the great chemist Amedeo Avogadro. The Mole is used in a lot of conversion problems in chemistry. We work out two practice problems here in full. We'll be your very own homework tutor for chemistry! You can click on the links below to jump to sections in the lesson: 0:05 Counting words (pair, dozen, ream, mole) 1:11 Representative particles (atoms, ions, formula units, molecules) 2:00 Avogadro's number 2:59 Where did Avogadro's number come from? (Carbon-12) 3:30 Converting from mass to number of particles, using the mole. 6:56 Converting from volume of a gas to number of particles, using the mole. 9:25 A map relating all the conversions using the mole ///////////////////////// What to watch Next: Molar Mass: http://bit.ly/2pNfg8L Scientific Notation: http://bit.ly/2cv6yTw Significant Figures: http://bit.ly/2b1g3aJ Unit Conversion 1: http://bit.ly/1YGOQgw Unit Conversion 2: http://bit.ly/1RGbwZ1 ///////////////////////// Our Periodic Table app is FREE in the Google Play store! http://goo.gl/yg9mAF Don't miss our other chemistry videos: https://www.youtube.com/watch?v=aQw9G... Please Subscribe so you'll hear about our newest videos! http://bit.ly/1ixuu9W If you found this video helpful, please give it a "thumbs up" and share it with your friends! ///////////////////////// To support more videos from Socratica, visit Socratica Patreon https://www.patreon.com/socratica http://bit.ly/29gJAyg Socratica Paypal https://www.paypal.me/socratica We also accept Bitcoin! :) Our address is: 1EttYyGwJmpy9bLY2UcmEqMJuBfaZ1HdG9 ///////////////////////// We recommend the following books: Brown and LeMay Chemistry: The Central Science 13th edition: http://amzn.to/2n5SXtB 14th edition: http://amzn.to/2mHk79f McGraw/Hill Chemistry by Chang & Goldsby http://amzn.to/2mO2khf Uncle Tungsten: Memories of a Chemical Boyhood by Oliver Sacks http://amzn.to/2nlaJp0 Napoleon's Buttons: How 17 Molecules Changed History http://amzn.to/2lJZzO3 ///////////////////////// Written and Produced by Kimberly Hatch Harrison About our instructor: Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time. Kimberly taught AP Biology and Chemistry at an exclusive prep school for eight years. She is now the head writer and producer of Socratica Studios.