A 0.3500 g sample of brass is analyzed by the procedure in, Ask an Expert

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A 0.3500 g sample of brass is analyzed by the procedure in the above exercise. The Beer's Law constant for the copper ammonia complex is determined to be 7.50 x 10^-1 mL/mg. The absorbance of solution Y is found to be 0.115. What was the percent of copper in the brass sample?

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