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Please help !!

How is a pure substance different from a mixture?

A) A pure substance is heterogeneous.

B) A mixture is made of one substance.

C) Mixtures cannot be separated by physical means.

D) Pure substances cannot be separated by physical means.


Sagot :

Answer:

D

Explanation:

it is an element because it has a fixed composition

An element is a pure substance that cannot be separated by physical means

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