Question

A sample of nitrogen gas consists of 4.22*1023 molecules of nitrogen. How many moles of nitrogen gas are there

Answer 1

Answer: The number of moles of nitrogen are 0.7 moles.

Explanation:

We are given:

Number of molecules of nitrogen gas = $4.22\times 10^{23}$

According to the mole concept:

$6.022\times 10^{23}$ molecules are present in 1 mole of a compound.

So, $4.22\times 10^{23}$ number of molecules will be present in $\frac{1}{6.022\times 10^{23}}\times 4.22\times 10^{23}=0.7moles$ of a nitrogen gas.

Thus, the number of moles of nitrogen are 0.7 moles.