Finding Empirical and Molecular Formulas

This video clearly shows the steps required to:
- determine the masses of carbon, hydrogen, and oxygen present in a sample using data from a combustion analysis
- use the masses of carbon, hydrogen, and oxygen present in a sample to determine the empirical (or simplest) formula for a compound
- use the empirical formula and the given molar mass (or molecular weight) of a compound to determine the molecular formula for a compound.

The conversions and calculations for each step are very clearly shown and both use and canceling of units is emphasized throughout the examples.

The pace of the video is appropriate for an introductory chemistry course and the narration is very clear.

Viewing this video is highly recommended for anyone studying stoichiometry in their chemistry course.

• Once you purchase this lesson you will have access to these files:
• Empirical__Molecular_Formulas_Part_1.pdf
• Empirical_Molecular_Formulas_Part_2.pdf

I have taught high school chemistry in British Columbia, Canada for 35 years. I have a detailed understanding of all the prescribed learning outcomes for Chemistry 11 and Chemistry 12 and I have a good awareness of the areas where students may have difficulties. I can produce easy to understand videos to explain all the concepts in high school level chemistry. My website is www.colgurchemistry.com. There is a lot of free information and many resources there.

Very helpful

11/10/2010

~ 245

Thank you very much for breaking this down so completely. It really tied up some loose ends for me.

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