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| Calculations: Formula: cuiiso4.5h2o(s) Molar Mass: 850.271 g/mol 1g=1.17609562127839E-03 mol Percent composition (by mass): Element Count Atom Mass %(by mass) c 1 12.011 1.41% u 1 238.02 27.99% i 2 126.905 29.85% s 6 32.06 22.62% o 9 15.999 16.93% h 10 1.0079 1.19% | 
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