Here is a breakdown of the names for each of the given compounds:
- Fe C2H3O2: This compound is named Iron(II) acetate. Iron can have multiple oxidation states, and in this case, it is in the +2 state. Acetate is the anion derived from acetic acid.
- BrF: This is named Bromine monofluoride. In binary compounds, the less electronegative element is named first, followed by the more electronegative one, and the appropriate prefix (mono) indicates the quantity of atoms.
- K2O2: This compound is known as Potassium peroxide. Potassium is a Group 1 element and forms peroxides when it combines with oxygen in a 2:2 ratio.
- SiBr4: This is named Silicon tetrabromide. Silicon is the more electropositive element and is followed by the tetrabromide, indicating four bromine atoms are present.
- Cu MnO4: This compound is Copper(I) permanganate. Here, copper is in the +1 oxidation state, and permanganate is a well-known polyatomic ion.
- CaCrO4: This is named Calcium chromate. Calcium typically has a +2 oxidation state, and chromate is equal to CrO4 with a -2 charge, balancing the calcium cation.
Each name reflects the composition and oxidation states of the elements present in the compounds, following systematic nomenclature rules used in chemistry.