While studying the chapter on gas laws you must have come across the term ‘mole’ or ‘mol‘. You may have seen gram-mol as well in that chapter. I find many students confused with mole (or mol) and molecule. Here we will discuss and explain the concept of mole or mol with some examples. 1> In […]
Density & Relative density
Density is the mass per unit volume. The unit of density in SI is Kg/meter3. The relative density or specific gravity of a substance is the ratio of its own density and the density of water. It’s a number only without any unit. What is the difference between density and relative density? Density is the […]
Mass and Weight – are they the same or different?
Mass and Weight – are they the same or different? Mass and weight are different. Mass is the quantity of matter; it is an absolute measurement of how much matter is in a body or an object. The SI unit of mass is the kilogram (kg). Weight is the force that acts on a mass […]