Mole is defined as the quantity of a substance that contains 6.022 X 1023 particles ( atoms, molecules ,formula units or ions).
Mole is represented by ” mol”.
It’s unit is mol-1
Chemical equation Representation:
A chemical equation is a way to represent chemical reaction by using symbols, chemical formulae and notations.
A balance equation represents molecular, molar, mass and volume ratio. However volume ratio is for gases only.
N2(g) + 3H2(g) form 2NH3(g)
Molecular ratio 1 molecule 3 molecules 2 molecules
Molar ratio 1 mole 3 moles 2 moles
Mass ratio (14×2)=28g 3(1×2)=6g 2(14+1×3)=34g
Volume ratio (for gases only) 1 volume 3 volumes 2 volumes