Nitrogen molecules in 1.4 moles of n2

From the Avogadro's constant 1 mole is equal to 6.028 molecules.

Therefore, we can convert moles to molecules;

1 mole = 6.028 * 10^23 molecules

Hence; 1.4 moles of Nitrogen gas will have;

1.4 * 6.028 * 10^23 molecules

= 8.44 * 10^23 molecules