A Concentration is the relative amount of a substance mixed with another substance. An example is five PPM of Carbon Monoxide in air or 1 mg/l of iron in water.
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A Concentration is the amount of one material dispersed or distributed in a larger amount of another material
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A Concentration is amount of a chemical in a particular volume or weight of air, water, soil, or other medium. See parts per billion, parts per million. See parts per billion, parts per million.
List of books: Concentration

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