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Stoichiometry Tutorials: Part 3 - Dimensional Analysis / Stoichiometric Conversions (from a complete OLI stoichiometry course)
Dimensional analysis allows us to change the units used to express a value. For instance, it allows us to convert between volume expressed in liters and volume expressed in gallons. The following video gives a brief overview of dimensional analysis, including conversion between the amount of a substance expressed in "number of molecules" and the amount of a substance expressed in "moles of molecules."
Remember that it is always a good idea to write both the unit and substance associated with any chemical quantity; e.g., 1.3 g H2O or 5.4 x 1023 molecules H2 instead of 1.3 g or 5.4 x 1023 molecules. This will help you keep track of your quantities correctly and prevent you from making mistakes in your computations.
Conversion table for problems below.
These tutorials are part of a set of equilibrium materials developed with the Open Learning Initiative at Carnegie Mellon University. To access the entire course, please see http://www.cmu.edu/oli/courses/enter_chemistry.html.
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|Page Last Updated: 02.15.2011|