Opt9 for determination of copper in the color of the alloy sample

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9. To determine the copper in the color of the alloy sample weighing 0.3560 g after treatment with ammonia solution and 250 cm3 was obtained colored solution, the optical density is in the cuvette l = 1,0 cm was 0.260. The molar absorbance coefficient of equal to 400. The copper ammine determine a mass fraction (%) of copper in the alloy.

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