Write formulas for the following compounds consisting of a metal cation and nonmetal anion:
1. Ferrous sulfide
2. Nickel(III) oxide
3. Iron(III) hydroxide
4. Chromium(III) oxide
5. Ferric oxide
6. Titanium(IV) chloride
7. Aluminum iodide
8. Cobalt(II) chloride hexahydrate
9. Copper(I) chloride
10. Cobaltous oxide
11. Cupric cyanide tetrahydrate
12. Mercury(II) chloride
13. Manganese(IV) oxide
14. Mercuric iodide