• # question_answer 14) Calculate the concentration of nitric acid in moles per litre in a sample which has density, $1.41g\,m{{L}^{-1}}$ and has mass per cent of nitric acid in it being 69%.

We know, $M=\frac{x\times d\times 10}{{{m}_{B}}}$ where $x=$ Percentage by mass of solute $d=$ density of solution ${{m}_{B}}$ = molar mass of solute $M=\frac{69\times 1.41\times 10}{63}=15.44$