Which packing scheme describes the structure of zinc(II) sulfide?     closest-packed sulfide ions with zinc(II) ions occupying all of the tetrahedral interstices     closest-packed sulfide ions with zinc(II) ions occupying 1/2 of the tetrahedral interstices     closest-packed sulfide ions with zinc(II) ions occupying 1/4 of the tetrahedral interstices     closest-packed zinc(II) ions with sulfide ions occupying all of the tetrahedral interstices     closest-packed zinc(II) ions with sulfide ions occupying 1/2 of the tetrahedral interstices     closest-packed zinc(II) ions with sulfide ions occupying 1/4 of the tetrahedral interstices

Which of the following statements correctly describes the NaCl structure type? a. NaCl structure is composed of hexagonal close-packing of Cl- anions with Na+ cations occupying every tetrahedral hole, this arrangement of cations and anions results in a 6:6 cation:anion coordination b. NaCl structure is composed of cubic close-packing of Cl- anions with Na+ cations occupying every octahedral hole, this arrangement of cations and anions results in a 6:6 cation:anion coordination c. NaCl structures is composed of cubic close-packing of Cl- anions with Na+ cations occupying every second tetrahedral hole, this arrangement of cations and anions results in a 4:4 cation:anion coordination d. No answer text provided.

Determine the empirical formula for the following compound. Use the notation W, Yy. Assume that W is a cation and Y is an anion. Determine the coordination number for the yellow spheres (i.e., how many white ions each yellow ion is adjacent to). Determine the coordination number for the white spheres (smaller spheres like those on the corners). Empirical Formula W6Y8 Coordination number for yellow spheres 6 Coordination number for white spheres 8