Question

Calculate volume occupied by 28u nitrogen gas

Answer 1

First of all,

Atomic mass of N₂ = 14 u
Given mass of N₂ = 28u

∴Moles of N₂ = Given mass/Atomic mass
                      = 28/14
                      = 2 moles

We know that 1 mole of any gas occupies 22.4 litres volume at STP conditions.

So, Volume of 28u N₂ gas = 2*22.4 = 44.8 litres

Answer 2

Answeratomic mass of n² =14

Volume in 28u =?

No. Of mole=mass / molecular mass

Molecular mass =2

Mole= 28/14=2

2moles

In 1 mole 22.4 litres so in 2 moles 44.8 litre