Answer: By using mole concept
Explanation:
We are given:
An unknown compound having some number of molecules.
To calculate the number of moles that are contained in a sample, we use mole concept:
According to mole concept:
1 mole of any compound contains \(6.022\times 10^{23}\) number of molecules.
Using this relation and applying unitary method, we can easily calculate the number of moles of a compound.
For Example: A sample of water contains \(10.8396\times 10^{23}\) number of molecules.
So, by using mole concept:
\(6.022\times 10^{23}\) number of molecules are contained in 1 mole of a compound.
So, \(10.8396\times 10^{23}\) number of molecules will be contained in \(\frac{1}{6.022\times 10^{23}}\times 10.8396\times 10^{23}=1.8 moles\) of water
