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What is a chemical reaction?
A process where reactants transform into products with new properties
What is a chemical equation?
A symbolic representation of a chemical reaction using formulas
What is a balanced chemical equation?
An equation where the number of atoms of each element is equal on both sides
What is the law of conservation of mass?
Mass of reactants equals mass of products in a chemical reaction
What is a combination reaction?
Two or more substances combine to form a single product, e.g. 2H₂ + O₂ → 2H₂O
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