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In the gravimetric determination of Zn^2+, 2.2024 g sample was dissolved and made up to volume in a 100.0 mL flask. A 10.0 mL aliquot were precipitated by adding a soluble pyrophosphate salt and heating the precipitate to a solid Zn2P2O7 (304.728 g/mol). The final, dried product weighed 0.1314 g. What is the percent weight of Zn (65.39 g/mol) in the original sample?