# How do you define the concentration units mass percent and molarity?

$\text{Mass percent}$ $=$ "Mass of component"/"Mass of compound"xx100%
And $\text{molarity}$ $=$ $\text{Moles of solute"/"Volume of solution in litres}$
$\text{Mass percent}$ is dimensionless, whereas $\text{molarity}$ has units $m o l \cdot {L}^{-} 1$.