Which of the following is a property of a pure substance?
olt consists of different types of compounds.
o it may have substances in different states of matter.
olt is made up of a single element or type of compound.
its components can be separated by employing physical methods.

See below.

Explanation:

It is made up of a single element or compound.

An example is the metal copper or the compound sodium chloride.

Option (c) is the correct answer.

Explanation:

A pure substance is defined as the substance that contains either same or different type of atoms which are chemically combined to each other in a fixed ratio by mass.

For example, both and are pure substances.

A pure substance can only be separated by chemical means.

So, this shows that a pure substance can be made up of same elements or different type of elements that constitute a compound.

Thus, we can conclude that a property of a pure substance is that it is made up of a single element or type of compound.

it is the most commonly accepted one