Mole and Chemical Equation

Mole :

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

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.

N_2(g) + 3H_2(g) form 2NH_3(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