Chemistry 221 L1 Video Lecture from November 14, 2025. This video covers material from Chapter 6 including molarity, preparing a solution through measurement of a solid and dilution, the dilution equation, mass and volume percentages, parts per million, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

This video offers a few tips and tricks on how to prepare for the Class Presentations in CH 221.توسط Michael Russell

Chemistry 221 L1 Video Lecture from November 12, 2025. This video covers material from Chapter 6 including empirical formula, molecular formula, finding an empirical (and molecular) formula from combustion, concentration, molarity, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L1 Video Lecture from November 10, 2025. This video covers material from Chapter 6 including formula mass and molar mass, how chemists find a molecular formula, percent composition, empirical formulas, using molar mass to convert empirical formulas to molecular formulas, and more. CH 221 website: http://mhchem.org/221 Let me know if y…

Chemistry 221 L1 Video Lecture from November 7, 2025. This video covers Day 3 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

This video shows the Complete Lecture for the Exam II Review in CH 221.توسط Michael Russell

This video offers a few tips and tricks on how to prepare for the second midterm exam in CH 221.توسط Michael Russell

Chemistry 221 L2 Video Lecture from November 6, 2025, Part 3 of 4. This video covers material from Chapter 6 including finding an empirical formula, the difference between an empirical formula and a molecular formula, finding a molecular formula using an empirical formula and the molar mass, and more. CH 221 website: http://mhchem.org/221 Let me kn…

Chemistry 221 L2 Video Lecture from November 6, 2025, Part 4 of 4. This video covers material from Chapter 6 including solutions, morality, creating a solution from mass of solute, creating a solution using a concentrated solution (C1V1 = C2V2), other concentration types, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any q…

Chemistry 221 L2 Video Lecture from November 6, 2025, Part 2 of 4. This video covers Part II of an Exam Review for the upcoming Midterm Exam II. This lecture also started the material for Chapter 6 including finding a formula in chemistry, methods for finding an empirical formula, and more. CH 221 website: http://mhchem.org/221 Let me know if you h…

Chemistry 221 L2 Video Lecture from November 6, 2025, Part 1 of 4. This video covers Part I of an Exam Review for the upcoming Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from November 5, 2025. This video covers Day 2 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from November 3, 2025. This video covers Day 1 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from October 31, 2025. This video covers material from Chapter 5 including building a molecular orbital diagram, bond order, bond order with respect to Lewis structures, magnetism, making ions in MO diagrams, shorthand notation, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Pea…

This is the video introduction to Chapter Guide Five for Chemistry 221.توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “Valence Bond and Molecular Orbital Theory”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “Chapter 5 Screencast - Valence Bond Theory (BF3)”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “Chapter 5 Screencast - Valence Bond Theory (CH4)”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “Multiple Bonds in VB Theory”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “An Introduction to Molecular Orbital Theory”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “MO Diagrams and Bond Order”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “More MO Diagrams (pi bonds)”توسط Michael Russell

A screencast from Chapter 5 in CH 221 entitled “Paramagnetism and Ions in MO Theory”توسط Michael Russell

This the Complete Lecture for Chapter 5. This episode is part 1 of 2 episodes.توسط Michael Russell

This the Complete Lecture for Chapter 5. This episode is part 2 of 2 episodes.توسط Michael Russell

Chemistry 221 L2 Video Lecture from October 30, 2025, Part 3 of 3. This video covers material from Chapter 5 including magnetism in molecular orbital (MO) theory, short hand notation in MO theory, determining the number of sigma and pi bonds in MO theory and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L2 Video Lecture from October 30, 2025, Part 2 of 3. This video covers material from Chapter 5 including an introduction to molecular orbital theory, bonding and antibonding orbitals, the four principles of MO theory, bond order in MO Theory and in Lewis Structures, and more. CH 221 website: http://mhchem.org/221 Let me know if you ha…

Chemistry 221 L2 Video Lecture from October 30, 2025, Part 1 of 3. This video covers material from Chapter 5 including an introduction to valence bond theory, orbital hybridization, sigma and pi bonds, the nature of a pi bond, hindered rotation around double bonds (relative to sigma bonds), and more. CH 221 website: http://mhchem.org/221 Let me kno…

Chemistry 221 L1 Video Lecture from October 29, 2025. This video covers material from Chapter 5 including valence bond theory (sp3 hybridization), the origin of double and triple bonds (pi bonds), molecular orbital theory, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L1 Video Lecture from October 27, 2025. This video covers material from Chapter 4 and Chapter 5 including molecular polarity, VSEPR, Valence Bond Theory (VB) and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from October 24, 2025. This video covers material from Chapter 4 including violations of the octet rule, paramagnetic compounds, formal charges, VSEPR, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 3 of 3. This video covers material from Chapter 4 including VSEPR with trigonal bipyramid and octahedral structures, molecular polarity, how to determine if a molecule is polar or nonpolar and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 2 of 3. This video covers material from Chapter 4 including multiple (double and triple) bonds, exceptions to the octet rule, paramagnetic molecules, VSEPR and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 1 of 3. This video covers material from Chapter 4 including ionic and covalent bonding, Coulomb's Law, the Lewis structure, electronegativity, valence and core electrons, bonding and lone pairs, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L1 Video Lecture from October 22, 2025. This video covers material from Chapter 4 including polar versus nonpolar bonds, electronegativity, valence electrons, the Lewis structure, building a Lewis structure, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

Chemistry 221 L1 Video Lecture from October 20, 2025. This video covers day 3 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from October 17, 2025. This video covers day 2 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

This video shows the Complete Lecture for the Exam I Review in CH 221.توسط Michael Russell

This video offers a few tips and tricks on how to prepare for the first midterm exam in CH 221.توسط Michael Russell

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 3 of 3. This video covers Part 3 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 2 of 3. This video covers Part 2 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 1 of 3. This video covers Part 1 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from October 15, 2025. This video covers day 1 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!توسط [email protected]

Chemistry 221 L1 Video Lecture from October 13, 2025. This video covers material from Chapter 3 including the nomenclature of ionic compounds, the nomenclature of covalent compounds, variable charge metals, Roman numbers, Greek prefixes, polyatomic ions, acid and bases, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any que…

Chemistry 221 L1 Video Lecture from October 10, 2025. This video covers material from Chapter 3 including electron configurations for neutral atoms and ions (cations and anions), periodic trends (for size, ionization energy and electron affinity), and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!…

This is the video introduction to Chapter Guide Three for Chemistry 221.توسط Michael Russell

A screencast from Chapter 3 in CH 221 entitled “Waves and Frequencies for Electromagnetic Radiation”توسط Michael Russell

A screencast from Chapter 3 in CH 221 entitled “Planck's Constant”توسط Michael Russell

A screencast from Chapter 3 in CH 221 entitled “Photoelectric Effect / nm to kJ Conversions”توسط Michael Russell

A screencast from Chapter 3 in CH 221 entitled “The Bohr Model”توسط Michael Russell