Number of moles of dinitrogen = $\frac{14}{28}$ = 0.05 Number of molecules in 1.4 g of dinitrogen = 0.05 × 6.022 × $10^{23}$ molecules = 0.3011 × $10^{23}$ molecules = 3.011 × $10^{22}$ molecules Since 1 molecule of dinitrogen has 14 electrons. ∴ 3.011 × $10^{22}$ molecules of dinitrogen have = 14 × 3.011 × $10^{22}$ electrons = 4.2154 × $10^{23}$ electrons