How Many Moles of CaF₂ Will Dissolve in 3

Multiple Choice

How many moles of CaF₂ will dissolve in 3.0 L of 0.050 M NaF solution? (K_sp for CaF₂ = 4.0 × 10^-11)

A) 4.8 × 10^-8 mol
B) 8.9 × 10^-9 mol
C) 8.0 × 10^-8 mol
D) 2.7 × 10^-8 mol
E) none of these