CHEM 1211 Chapter 1: Chapter 1.docx

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Heterogeneous: physical process a transformation of a sample of matter, such as a change in its physical state, that does not alter the chemical identities of any of the substances in the sample, you cannot separate some things like water through such a process, mixture two or more substances that can be separated fro one another by a physical process, the pure substances in a mixture are not present in definite proportions, and they retain their chemical identities, homogeneous mixtures are also solutions, uniform distribution and the mixture appears uniform throughout, the term solution is used for gases, solid, and liquids, compound a substance that consists of two or more elements that can be separated from one another only by a chemical process, they typically have properties that are very different from the elements of which they are composed, law of constant composition every sample of a particular compound always contains the same elements combined in the same proportions.

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