Equal Volumes of a 0

Multiple Choice

Equal volumes of a 0.020 M Zn²⁺ solution and a 2.0 M NH₃ solution are mixed. Kf for [Zn(NH₃) ₄]²⁺ is 4.1 × 10⁸. If enough sodium oxalate is added to make the solution 0.10 M in oxalate, will ZnC₂O₄ precipitate? What is Q? Ksp ZnC₂O₄ = 2.7 × 10^-8

A) yes, Q = 11
B) yes, Q = 2.9 × 10^-12
C) no, Q = 2.9 × 10^-12
D) yes, Q = 2.4 × 10^-9
E) no, Q = 2.4 × 10^-9