24. Solving a chemistry problem

2. The content of indophenol in the solution was determined by its absorption at λ=625 nm. The relative optical density of a standard solution containing 47.5 μg/cm3 of indophenol is 0.565. For the solution being analyzed, this value is 0.774. In both cases, the comparison cuvette contained a solution containing 25 μg/cm3 of indophenol. Calculate the concentration (g/dm3) of indophenol in the analyzed solution.