Chemistry 221 Audio Lecture from October 4, 2017 covering material from Chapter 2 part I of our textbook including the history of chemistry, atomic numbers, isotopes, the mass number, and more. https://mhchem.org/221/classroom/zAudio/100417Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from October 2, 2017 covering material from Chapter 1 and Chapter 2 part I of our textbook including mass percentages, the history of chemistry, and more. There were technical issues today - sorry! https://mhchem.org/221/classroom/zAudio/100217Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from October 2, 2017 covering material from Chapter 1 and Chapter 2 part I of our textbook including mass percentages, the history of chemistry, and more. There were technical issues today - sorry! https://mhchem.org/221/classroom/zAudio/100217Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from September 29, 2017 covering material from Chapter 1 of our textbook including significant figures, temperature scales and more. https://mhchem.org/221/classroom/zAudio/092917Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from September 29, 2017 covering material from Chapter 1 of our textbook including significant figures, temperature scales and more. https://mhchem.org/221/classroom/zAudio/092917Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from September 27, 2017 covering material from Chapter 1 of our textbook including states of matter, density, the metric system, and more. https://mhchem.org/221/classroom/zAudio/092717Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from September 27, 2017 covering material from Chapter 1 of our textbook including states of matter, density, the metric system, and more. https://mhchem.org/221/classroom/zAudio/092717Chemistry221AudioLecture.mp3

Chemistry 221 Video Lecture from September 25, 2017 covering material from Chapter 1 of our textbook and providing an overview of "what chemistry is". :) https://mhchem.org/221/classroom/zAudio/092517Chemistry221VideoLecture.m4v

Chemistry 221 Audio Lecture from September 25, 2017 covering material from Chapter 1 of our textbook and providing an overview of "what chemistry is". :) https://mhchem.org/221/classroom/zAudio/092517Chemistry221AudioLecture.mp3

This is a lab video which shows how to use a top loading balance. We shall be using them in the upcoming "Density" lab.... and several times afterwards as well. https://mhchem.org/221/classroom/zAudio/zChemVideos/TopLoadingBalance.mp4