Chemistry 221 Video Lecture from October 11, 2019 covering material from Chapter 2 Part II of our textbook including covalent bonds, molar masses of molecules, number of atoms in a molecule, weight percents, and more. http://mhchem.org/221/classroom/zAudio/101119Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from October 11, 2019 covering material from Chapter 2 Part II of our textbook including covalent bonds, molar masses of molecules, number of atoms in a molecule, weight percents, and more. http://mhchem.org/221/classroom/zAudio/101119Chemistry221AUdioLecture.mp3

This is a lab video which shows how to use the hot plate and stirrer combination. We shall be using them in the upcoming "Determination of an Empirical Formula" lab. https://mhchem.org/221/classroom/zAudio/HotPlate.mp4

Chemistry 221 Video Lecture from October 9, 2019 covering material from Chapter 2 Part II of our textbook including ionic bonds, charges on ions, polyatomic ions, Coulomb's Law, and more. http://mhchem.org/221/classroom/zAudio/100919Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from October 9, 2019 covering material from Chapter 2 Part II of our textbook including ionic bonds, charges on ions, polyatomic ions, Coulomb's Law, and more. http://mhchem.org/221/classroom/zAudio/100919Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from October 7, 2019 covering material from Chapter 2 Part I and Part II of our textbook including groups on the periodic table, types of formulas, allotropes, the 7 diatomics, and more. http://mhchem.org/221/classroom/zAudio/100719Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from October 7, 2019 covering material from Chapter 2 Part I and Part II of our textbook including groups on the periodic table, types of formulas, allotropes, the 7 diatomics, and more. http://mhchem.org/221/classroom/zAudio/100419Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from October 4, 2019 covering material from Chapter 2 Part I of our textbook including the mole, Avogadro's number, atomic weight, organization of the periodic table, and more. http://mhchem.org/221/classroom/zAudio/100419Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from October 4, 2019 covering material from Chapter 2 Part I of our textbook including the mole, Avogadro's number, atomic weight, organization of the periodic table, and more. http://mhchem.org/221/classroom/zAudio/100419Chemistry221AudioLecture.mp3

This is the video introduction to Chapter Guide Lesson Two (which covers the first portion of Chapter Two in our textbook) for Chemistry 221. https://mhchem.org/221/classroom/zAudio/CH221CG02.mp4