Question

definition and unit of mass and volume ​

Answer 1

Volume is usually expressed in cubic units of length. Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg). A material's density is defined as its mass per unit volume.

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Answer 2

Mass: A large body of matter with no definite shape. Its S.I unit is kilogram (kg)

Volume: the amount of space that a substance or object occupies, or that is enclosed within a container. It's S.I unit is cubic meter(m^3)