100 ml of solution contains 40 g of solute. Calculate the concentration in terms of mass by volume percentage of the solution.

 Given:  Mass of solute = 40g

               Volume of solution = 100 ml

Solution:

Mass by volume percentage of solution$=\frac{\mathrm{Mass} \mathrm{of} \mathrm{solute}}{\mathrm{Volume} \mathrm{of} \mathrm{solution}} \times 100$

                                                                              $= \frac{40}{100}\times 100$

                                                                              $=\frac{40}{1}$

                                                                             $=40\%$

The mass by volume percentage of the given solution is 40 %