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Published on 27 Aug 2009 | over 7 years ago

Introduction to the idea of a mole as a number (vs. an animal).

Watch the next lesson: www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-compounds/v/empirical-molecular-and-structural-formulas

Missed the previous lesson? www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/v/atomic-mass

Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.

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