Question

why composition of mixture is variable

Answer 1

Answer:

A mixture is a substance with a variable composition, meaning that it is composed of molecules or atoms of differing types. These may have intermolecular bonds, or bonds between molecules, but such bonds are not nearly as strong as those formed when elements bond to form a compound.

Answer 2

Answer:

Mixture is a substance with a variable composition.

Explanation:

meaning that it is composed of molecules or atoms of differing types. Air, too, is a mixture, because it contains oxygen, nitrogen, noble gases, carbon dioxide, and water vapor.