A solution of glucose in water is labeled as 10% w/w. What would be the molarity of the solution ?

$10\mathrm{\%}\left(\frac{\mathrm{W}}{\mathrm{W}}\right)$ glucose solution means
100gms of solution contains 10gm of glucose
$\therefore$ wt of glucose (w)=10gms
wt of water (w)=90gm
$\therefore$ Volume of solution=90ml
$\therefore$ $\text{ Molarity }=\frac{\mathrm{w}}{\mathrm{gmw}}\times \frac{1000}{\text{ vin ml }}$
$\begin{array}{l}\left(\because \mathrm{v}=\frac{\mathrm{w}}{\mathrm{d}}\right)(\mathrm{d}=0.998\mathrm{g}/\mathrm{ml})\\ =\frac{10}{180}\times \frac{1000}{90}=0.617\mathrm{M}\end{array}$