145. Solving a chemistry problem
11. The molar extinction coefficient of the complex of iron with sulfosalicylic acid at 416 nm is 4500. Determine which sample of Fe2 (SO43) * 9H2O should be dissolved in 50.0 cm3 so that a colored solution is obtained from 5.0 cm3, the optical density of which is 1 cm in the cuvette was equal to 1,000
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