Chemical substance
matter of constant composition best characterized by the entities (molecules, formula units, atoms) it is composed of and characterized by physical properties like density
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A chemical substance is any material with a known chemical composition.[1] For example, water has the same properties and the same ratio of hydrogen to oxygen whether it came from a river or was made in a laboratory. Typical chemical substances found in the home include water, salt (sodium chloride) and bleach. Generally, substances exist as a solid, a liquid, or a gas, and may change between these phases of matter when there are changes in temperature or pressure.
Gallery change
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White sodium chloride -
Pink hydrated (with water) manganese (II) chloride -
Brown manganese (II) carbonate -
Black copper (II) oxide -
Red hydrated (with water) cobalt (II) chloride -
Orange potassium dichromate -
Yellow sodium chromate -
Green hydrated (with water) copper (II) chloride -
Blue hydrated (with water) copper(II) sulfate -
Purple anhydrous (without water) chromium (III) chloride
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References change
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- ↑ Hill, J. W.; Petrucci, R. H.; McCreary, T. W.; Perry, S. S. General Chemistry, 4th ed., p5, Pearson Prentice Hall, Upper Saddle River, New Jersey, 2005.
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