An aqueous solution of glucose is marked as 10% w/w. The density of the solution is 1.2 text{ g/mL}. The molarity of the solution is approximately:

10% w/w glucose solution means $10 \text{ g}$ of glucose is present in $100 \text{ g}$ of solution. Volume of solution = $\text{Mass} / \text{Density} = 100 / 1.2 = 83.33 \text{ mL} = 0.0833 \text{ L}$. Moles of glucose = $10 / 180 = 0.0556 \text{ mol}$. Molarity = $0.0556 / 0.0833 = 0.667 \text{ M}$.