Step-by-step explanation:
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.
Examples of Chemical Changes
Examples of Chemical ChangesBurning wood.
Examples of Chemical ChangesBurning wood.Souring milk.
Examples of Chemical ChangesBurning wood.Souring milk.