Chemistry - Concentration Terms Question with Solution | TestHub

$100 \mathrm{mL}$of${\mathrm{Na}}_3{\mathrm{PO}}_4$solution contains$3.45 \mathrm{g}$of sodium. The molarity of the solution is .....$\times {10}^{-2} \mathrm{mol}{ \mathrm{L}}^{-1}$. (Nearest integer)
[Atomic Masses -$\mathrm{Na}:23.0\mathrm{u},\mathrm{O}:16.0\mathrm{u},\mathrm{P}:31.0\mathrm{u}]$