Question

number of atoms in 14u of nitrogen molecule N2

Answer 1

we know that,
1 molecule of N₂ = 28 u
1/2 molecule of N₂ = 14 u

Answer 2

Answer : The number of atoms in nitrogen molecule is, $3.011\times 10^{23}$

Solution : Given,

Mass of $N_2$ = 14 g

Molar mass of $N_2$ = 28 g/mole

First we have to calculate the moles of $N_2$ molecule.

$\text{Moles of }N_2=\frac{\text{Mass of }N_2}{\text{Molar mass of }N_2}=\frac{14g}{28g/mole}=0.5moles$

Now we have to calculate the number of atoms in $N_2$ molecule.

As, 1 mole of nitrogen molecule contains $6.022\times 10^{23}$ number of atoms

So, 0.5 mole of nitrogen molecule contains $0.5\times 6.022\times 10^{23}=3.011\times 10^{23}$ number of atoms

Therefore, the number of atoms in nitrogen molecule is, $3.011\times 10^{23}$