66 Решение задачки по химии №06 646

13. A sample of 0.65 g of an alloy containing copper, after dissolution, was treated with ammonia and 1000 cm3 of a colored solution was obtained, the optical density of which, with a cell layer thickness of 1 cm, is 0.127. The molar absorption coefficient of copper ammonia is 423. Determine the percentage of copper in the alloy.

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