# What is the molarity of a solution in which 1.20 moles of solute is dissolved in 3.00 L of solution?

$\text{Molarity}$ $\equiv$ $\text{Moles of solute (moles)"/"Volume of solution (L)}$.
So you have to work out this quotient, $\frac{1.20 \cdot m o l}{3.00 \cdot L}$, and quote an answer in $m o l \cdot {L}^{-} 1$.