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What is matter that has the same composition and properties throughout called?

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Quick Answer

A material that has the same composition and properties throughout is a pure chemical substance. A chemical substance cannot be separated into components by a physical method. Chemical substances can be plasma, gases, liquids or solids. Examples of pure substances include sodium chloride, sodium bicarbonate and sucrose.

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Full Answer

Every pure element and every pure compound are considered to be substances. Iron is an element and therefore it is a substance. A substance does not have to consist of a single element or molecule type. A substance is something that is free from contamination. Another example of a substance is methane, it is a pure compound and, therefore, a substance.

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