Mass of Unknown sample is 25.946g, Mass of SiO2 Recovered  is 7.8162g, Mass of KHO3 Recovered is 6.2381g, the % CuSO4, 5H2O in KNO3 is 0.3%, Mass of purified KNO3 Recovered(add 0.5 grams) is 6.621g, 12.66%  CuSO4, 5H2O in Purified KNO3, 30.125% SiO2 in Unknown,  25.520% KNO3 in Unknown, Calculate % CuSO4, 5H2O in Unknown.

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Mass of Unknown sample is 25.946g, Mass of SiO2 Recovered  is 7.8162g, Mass of KHO3 Recovered is 6.2381g, the % CuSO4, 5H2O in KNO3 is 0.3%, Mass of purified KNO3 Recovered(add 0.5 grams) is 6.621g, 12.66%  CuSO4, 5H2O in Purified KNO3, 30.125% SiO2 in Unknown,  25.520% KNO3 in Unknown, Calculate % CuSO4, 5H2O in Unknown.

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