Question

calculate the number of particles in 8g of nitrogen molecule

Answer 1

Here is the solution.
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Answer 2

Answer : The number of particles in 8g of nitrogen molecule is, $1.716\times 10^{23}$ number of particles

Solution : Given,

Mass of nitrogen = 8 g

Molar mass of nitrogen molecule = 28 g/mole

First we have to calculate the moles of nitrogen.

$\text{Moles of nitrogen}=\frac{\text{ given mass of nitrogen}}{\text{ molar mass of nitrogen}}= \frac{8g}{28g/mole}=0.285moles$

Now we have to calculate the number of particles.

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

So, 0.285 mole of nitrogen contains $0.285\times 6.022\times 10^{23}=1.716\times 10^{23}$ number of particles

Therefore, the number of particles in 8g of nitrogen molecule is, $1.716\times 10^{23}$ number of particles