Orthophosphate (PO4³) is determined by weighing as ammonium phosphomolybdate, (NH4)3PO4 •12MOO3. Calculate the percent P in the sample and the percent P2O5 if 1.1682 g precipitate (ppt) were obtained from a 0.2711-g sample. Perform the % P calculation using the gravimetric factor and just using dimensional analysis.

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