46. The content of anthracene in the solution was deter

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46. The content of anthracene in the solution was determined by its own absorption at 253 nm. The relative optical density of a standard solution containing 35.0 mg / l anthracene is Aot.st. = 0.412. In the test solution, this value is equal to Aint. = 0.396. In the comparison cells in both cases there was a solution containing 30.0 mg / l anthracene.
Calculate the concentration of mg / l anthracene in the test solution.