Answer
One may use the conversion factor $\frac{\text{ Moles}}{\text{ Liter}}$ to find the number of moles of a substance given a volume.
Similarly, one may use the conversion factor $\frac{\text{Liter}}{\text{Moles}}$ to find the number of liters of a substance given a molar quantity.
Work Step by Step
We use the first conversion factor by multiplying the number of liters of solution we have to find the number of moles of solute. The liters cancel out, leaving the number of moles of solute.
We use the second conversion factor by multiplying the number of moles of solute we have to find the number of liters of solution. The moles cancel out, leaving the number of liters of solution.