Final answer:
To find the mass of 0.564 moles of FPO4, multiply the number of moles by the molar mass.
Step-by-step explanation:
The molar mass of the compound FPO4 is computed to be 176.124 g/mol. To find the mass of 0.564 moles of FPO4, we can multiply the number of moles by the molar mass:
0.564 mol × 176.124 g/mol = 99.28 grams
Therefore, the answer is not one of the options provided. The correct answer would be approximately 99.28 grams.