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What makes a pure substance different from a heterogeneous mixture? (4 points)aThe components of a pure substance are mixed unevenly instead of evenly within the pure substance.bInsoluble instead of soluble particles are suspended within the pure substance.cTwo liquids that normally are not mixable are mixed in a heterogeneous mixture.dThe components of a pure substance are single elements or compounds instead of a mixture of compounds.

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Answer:

The difference is that the composition of the substance is always the same. ... By definition, a pure substance or a homogeneous mixture CONSISTS of a SINGLE phase. A heterogeneous mixture consists of two or more phases. When oil and WATER are combined, they do not mix evenly, but instead form two separate layers



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