A chemical substance is a form of matter that has constant chem... - dofaq.co
chemical substance

A chemical substance is a form of matter that has constant chem...

wikipedia - 24 Sep 2015
A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys.

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