Chemistry - Concentration Terms Question with Solution | TestHub

$63\%$ nitric acid by mass means that mass of nitric acid $=63\mathrm{g}$ Mass of solution $=100\mathrm{g}$ Molar mass of ${\mathrm{HNO}}_3=63\mathrm{g}{\mathrm{mol}}^{-1}$ Mole of ${\mathrm{HNO}}_3=\frac{63\mathrm{g}}{63\mathrm{g}{\mathrm{mol}}^{-1}}=1\mathrm{mole}$ Density of solution $=1.4\mathrm{g}{\mathrm{mL}}^{-1}$ $\therefore$ Volume of solution $=\frac{100\mathrm{g}}{1.4\mathrm{g}{\mathrm{mL}}^{-1}}=71.428\mathrm{mL}=0.071428\mathrm{L}$ Molarity of solution $=\frac{\text{ Moles of solute }}{\text{ Volume of solution in }\mathrm{L}}$ $=\frac{1.0}{0.071428}\mathrm{mol}{\mathrm{L}}^{-1}=14\mathrm{M}$