High phosphate levels in water systems may contribute to several environmental problems. One method to gather data for this determination would be to perform a gravimetric analysis to determine the level of phosphorus (P) in an aqueous sample by converting it to P2O7. A 25.00 gram sample of unknown water was acidified, properly treated with a precipitating agent and, when heated, showed the sample to contain 6.06% P. How many grams of P2O7 would have to be precipitated for this result?
P = 30.9738 g/mol; P2O7 = 173.94 g/mol