Question

What is a pure substance ?
​

Answer 1

Answer:

A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.

Answer 2

$\huge\underline \color{lightgreen}ANSWER$

Pure substances are defined as substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together).

The measure of whether a substance is pure is known as purity