8. Phosphorus fertilizers are derived from phosphate rocks, called fluorapatite, Cas(PO4)3F(s). Fluorapatite is insoluble in water, so it must first be dissolved using excess sulfuric acid to form water-soluble calcium dihydrogen phosphate Ca(H₂PO4)2. If a powdered 5.00 gram sample of a rock containing fluorapatite is reacted with sulfuric acid and 6.60 x 10-³ moles of HF(g) are released during the process, what is the % mass of fluorapatite in the rock sample? 2 Cas(PO4)3F(s) + 7 H₂SO4(aq) → 3 Ca(H₂PO4)2 (aq) + 7 CaSO4(aq) + 2 HF (8)​