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This video illustrates the calculation of an average atomic mass using the isotopic mass and isotopic abundance of the isotopes of argon.

This video describes percent, error and percent error. Example calculations are done for percent, error and percent error - the percent example is a percent by mass problem.

pH pOH

Solution stoichiometry

This video describes solution confrontation, with a focus on molarity and molarity calculations

This video describes how to determine if a molecule is polar or non polar using Lewis structures, molecular shape, and molecular symmetry.

This video describes how to determine the equation of a quadratic (in vertex form) from its graph.

This video describes the ideal gas law and shows a couple of example calculations using the ideal gas law.

This video describes Boyle's law.

This video describes Charles' law.

This video describes Gay-Lussac's law.

This video deals with the combined gas law - a combination of Boyle's law, Charles's law and Guy-Lussac's laws.

This video describes the process of determining the order of reaction with respect to the concentration of reactants.

Solve quadratics by completing the square

This video describes the process of finding the value that 'completes the square'.

Derive the quadratic formula from completing the square

Determine delta H from lab data

Specific heat and calorimetry

Introduction to thermochemistry

Thermochemical equations and stoichiometry

Special products and factoring special cases

Factor quadratics a is not 1, Lou Lou method

Solve quadratics, factoring and square root

Factor quadratics a is not 1

Factor quadratics a not 1, by grouping

Solve trinomial quadratics by factoring

Factor trinomial quadratics

Quadratic word problems

Solve quadratics by factoring, GCF