Chapter 16, Problem 4STP

Interpretation Introduction

Interpretation : The unit of mole fraction is to be chosen from the given options.

Concept Introduction : Mole fraction is the ratio of moles of solute to the total moles present in the solution.

Answer to Problem 4STP

Correct answer: (E) no units

Explanation of Solution

The mole fraction is calculated by the ratio of moles of solute to the total moles present in the solution (moles of solute $+$ moles of solvent).

Hence, the expression for mole fraction can be written as:

  $\frac{Molesofsolute(moles)}{Totalmoles(moles)}=\text{N}ounits$

Conclusion

Reason for incorrect options: The mole fraction has no unit, option (E) so all the other options are incorrect.