51. Solving a chemistry problem

1. To determine the manganese content in steel by the addition method, a sample of steel m (g) was dissolved, and after appropriate treatment, the volume of the solution was brought to 200.0 ml. To take polarograms, 15.5 ml of this solution was taken. The wave height was 20.5 mm. After adding V (ml) of a solution of MnSO4 with a concentration of 0.0500 M (f = 1/2), the wave height increased to h*.
Determine the mass content w (%) of manganese in steel for the following options:
m, g 1,500
V,ml 2.5
h,mm 23.8