Statement 1 : As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.

Statement 2 : The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

The number of moles of a solute present in one litre of solution is known is as molarity (M).

The total number of molecules of reactants present in a balanced chemical equation is known as molecularity. For example,

$\begin{array}{l}{\mathrm{PCl}}_5\to {\mathrm{PCl}}_3+{\mathrm{Cl}}_2\left(\mathrm{Unimolecular}\right)\\ 2\mathrm{HCl}\to {\mathrm{H}}_2+{\mathrm{I}}_2\left(\mathrm{Bimolecular}\right)\end{array}$

$\therefore$ Molarity and molecularity are used in different sense.