Chemistry: Basic Concepts of Chemistry (Mole concept)

Y-map : Interconversion of mole - volume, mass and number of particles :

The laws of chemical combination :
Atoine Lavoisier, John Dalton and other scientists formulate certain law concerning the composition of matter and chemical reactions. These laws are known as the law of chemical combination.
(i) The law of conservation of mass :

In a chemical change total mass remains conserved.
i.e. mass before reaction is always equal to mass after reaction.