What is Chemical??? ???????
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A chemical by definition is any substance consisting of matter; this includes solids, liquids, and gas. Chemicals can either be of a pure substance or a mixture of substances. A chemical substance such as water (H2O) is a pure chemical because it has the same molecules and combination throughout its structure
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Any substance (as an acid) that is formed when two or more other substances act upon one another or that is used to produce a change in another substance.
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