Verified Answer :

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A mole or fraction of a mole represents a specific number of atoms or molecules. The correct option among all the options that are given in the question is the first option or option "a". The other choices in the question are incorrect. I hope that the answer has actually come to your great help.

Answer : The correct option is, (a) specific

Explanation :

Mole fraction : Mole fraction of a constituent (solute as well as solvent) the fraction obtained by dividing the number of moles of that constituent by the total number of moles of all the constituents present in the solution. It is denotes as 'x'

And the sum of the mole fraction of the solvent and the solute is equal to '1'.

\(x_{solute}=\frac{\text{moles of solute}}{\text{moles of solvent}+\text{moles of solute}}\)

\(x_{solvent}=\frac{\text{moles of solvent}}{\text{moles of solvent}+\text{moles of solute}}\)

\(x_{solvent}+x_{solute}=1\)

Hence, a mole or fraction of a mole represents a specific number of atoms or molecules.

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