22. Given the following complexes, predict which two are labile? A: (NH₄)₂Cr(=O)Cl₃ B: K₂MnI₆ C: K₃[Fe(CN)₆] D: [Fe(NH₃)₆]Cl₂ (A) A, C (B) B, C (C) A, D (D) B, D (E) None of the above is correct

4. Both ZnS and CaF₂ have a face-centered cubic unit cell where the S²⁻ and Ca²⁺ ions are closest packed in each structure. Which of the following is true? (A) There are 4 tetrahedral holes empty in each structure. (B) In both compounds, one-half of the tetrahedral holes are filled. (C) In both compounds, all the tetrahedral holes are filled. (D) There are 8 Zn²⁺ ions and 4 F⁻ ions in the unit cell. (E) In ZnS, one-half of the tetrahedral holes are filled by Zn²⁺ ions, whereas in CaF₂ all the tetrahedral holes are filled with F⁻ ions.

22. Given the following complexes, predict which two are labile? A: (NH₄)₂Cr(=O)Cl₃ B: K₂MnI₆ C: K₃[Fe(CN)₆] D: [Fe(NH₃)₆]Cl₂
(A) A, C
(B) B, C
(C) A, D
(D) B, D
(E) None of the above is correct

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