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In chemistry, composition refers to the types and amounts of different substances that make up a particular sample of matter. It can be expressed in various ways, including:
Percent composition: Indicates the relative amounts of each element present in a compound or mixture.
Empirical formula: Shows the simplest whole-number ratio of atoms in a compound.
Molecular formula: Specifies the actual number of atoms of each element in a molecule.
Understanding composition is crucial for identifying, analyzing, and predicting the properties and reactions of chemical substances.