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a substance that cannot be separated or broken down into simpler substances by chemical means
a sample of matter, either a single element of a single compound, that has definite chemical and physical properties
a homogeneous mixture of two or more substances uniformly dispersed throughout a single phase
the amount of a particular substance in a given quantity of a mixture, solution, or ore
a mixture in which particles of a material are more of less evenly dispersed throughout a liquid of gas
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