10. Calculate the mass of rutin (vitamin P, M = 610 g/mol) in 250 ml of solution, if the optical density of this solution at λ = 258 mm and a cuvette thickness of 50 mm is 0.780, and the standard 6.0 * 10-5 M solution routine - 0.650. What are the values of the molar, mass and specific absorption coefficients of rutin at a given wavelength?

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