In chemistry class today, we took a pretest over our next unit: Chemical Composition. I thought the test was difficult. However, once I learn the concepts in class, I believe that I will have a better understanding of what's on the exam. A couple terms I remember from the test were empirical formulas and finding the percent by mass. I have a couple pictures and links below that help explain these concepts.
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| http://quantummechanics.mchmultimedia.com/2011/general-chemistry-general-chemistry/004-empirical-formula-in-chemistry/ |
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| http://quantummechanics.mchmultimedia.com/2011/general-chemistry-general-chemistry/004-empirical-formula-in-chemistry/ |
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