Question

define chemical substance in chemistry ​

Answer 1

Explanation:

A chemical substance is a form of matter having constant chemical composition and characteristic properties.

Chemical substances may be combined or converted to others by means of chemical reactions. Forms of energy, such as light and heat, are not matter, and are thus not "substances" in this regard.

Answer 2

Explanation:

In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components without breaking chemical bonds. Chemical substances can be solids, liquids, gases, or plasma.