47. Solution to Chemistry Problem
Seller: Derkach
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29.2 To determine copper in the alloy, 250.0 cm3 of a colored solution was obtained from a 0.3200 g sample after dissolution and treatment with ammonia; its optical density in a cell with a layer thickness of 10 mm was 0.275. Determine the mass fraction of copper in the alloy (in %); the molar absorption coefficient of copper ammine is 400.
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