Final answer:
The IUPAC formula for chromium(III) oxide is Cr2O3, and for sulfur trichloride, it is SCl3. Additionally, formulas for other ionic compounds were provided such as chromium(III) phosphide (CrP) and copper(I) oxide (Cu2O).
Step-by-step explanation:
The IUPAC formula for chromium(III) oxide is Cr2O3. In this compound, chromium has a valence of +3. Sulfur trichloride is an inorganic compound and its chemical formula is SCl3.
Now, let's write the formulas of some other ionic compounds as examples:
- Chromium(III) phosphide is CrP.
- Mercury(II) sulfide is HgS.
- Manganese(II) phosphate is Mn3(PO4)2.
- Copper(I) oxide is Cu2O.
- Iron(III) chloride dihydrate is FeCl3·2H2O.