Respuesta :
Answer:
C- A mixture can vary in composition, but a pure substance has a set composition
Explanation:
The main difference between a mixture and a pure substance is: A mixture can vary in composition, but a pure substance has a set composition ( option c )
Mixture
A mixture is a substance which contains two or more constituents which can easily be separated by a physical means. It consists of two or more different substances, not chemically joined together.
Substance
A pure substance consists only of one element or one compound.
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