Question

How many moles of n2(g) would contain exactly 4.0 moles of nitrogen atoms?

Answer 1

Each nitrogen molecule had 2 Nitrogen atoms.
So 2 moles of nitrogen gas molecules will have 4 moles of nitrogen atoms.Answer is 2moles

Answer 2

Answer : The number of moles of $N_2$ contains are, 2 moles.

Explanation : Given,

Moles of nitrogen atoms = 4 moles

First we have to calculate the number of nitrogen atoms.

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

So, 4 mole of nitrogen atom contains $4\times 6.022\times 10^{23}$ number of nitrogen atoms

Now we have to calculate the moles of $N_2$ atoms.

As, $2\times 6.022\times 10^{23}$ number of nitrogen atoms present in 1 mole of $N_2$ atoms

As, $4\times 6.022\times 10^{23}$ number of nitrogen atoms present in $\frac{4\times 6.022\times 10^{23}}{2\times 6.022\times 10^{23}}=2$ mole of $N_2$ atoms

Therefore, the moles of $N_2$ atoms contains are, 2 moles