22. Using the experimental data of spectrophotometric measurements, confirm graphically the applicability of the Lambert-Bouguer-Beer law to the hydrosol of sulfur black dye and determine the concentration of the sol at A=60.
C*103 , kg/m3 10 30 50 70 90 120
Optical density D 0.08 0.22 0.36 0.52 0.69 0.92

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