Question

what are the different between the mass of an object and its weight

Answer 1

mass is the actual weight of an object, I.e. how heavy it is.
weight is the product of mass and gravity
in physics, weight is treated as a force

Answer 2

hello there!!!!

Mass of the substance is the amount of matter present in it...

Weight is the force exerted by the gravity on an object...

The mass of the substance is constant whereas it's weight may vary from one place to another due to change in gravity....

SI unit of mass is Kilogram Kg

hope it helps you