Balancing chemical equations | Chemical reactions and stoichiometry | Chemistry | Khan Academy
How to balance a chemical reaction by making sure you have the same number of atoms of each element on both sides.
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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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