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Mathematics 19 Online
OpenStudy (anonymous):

1. Compare the information provided by a molecule’s chemical formula to the information provided by its structural formula. 2. What is the major difference between the two-dimensional and three- dimensional models of propane and ethene? When might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules? 3. Use the Internet to research how chemists know that an oxygen molecule has unpaired electrons. Summarize the reason in at least 2-3 sentences.

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