What makes a pure substance different from a heterogeneous mixture?

Question

Group of answer choices

Two liquids that normally are not mixable are mixed in a heterogeneous mixture.

The components of a pure substance are single elements or compounds instead of a mixture of compounds.

The components of a pure substance are mixed unevenly instead of evenly within the pure substance.

Insoluble instead of soluble particles are suspended within the pure substance.

Answer 1

The correct choice that distinguishes a pure substance from a heterogeneous mixture is:

The components of a pure substance are single elements or compounds instead of a mixture of compounds.

A pure substance has a consistent composition and distinct properties, while a heterogeneous mixture consists of different substances that can typically be physically separated and do not have a uniform composition throughout.