There are a umber of different oxides of iron. It depends of the oxidation state of iron. Hematite is Fe2O3, iron(III) oxide. Magnetite is Fe3O4 (diron(II) diron(III) oxide. There is also FeO, iron(II) oxide.
The chemical formula for Calcium oxide is CaO. A single calcium atom bonds with a single oxygen atom to make this compound, and a link can be found below for more information.CaO
There is more than one oxide of Iron, to answer your question you need to be more specific with which oxide you are asking about.
Chemical formula is CaO
Potassium oxide is a ionic lattice which is made out of potassium ions and oxide ions. Therefore, separate 'molecules of this compound do not exist. The empirical formula itself is K2O which is used also as the chemical formula for the compound.
The sodium ion is Na+ and the oxide ion is O2-. Therefore the ionic compound formed between the two ions has chemical formula Na2O which is sodium oxide.
The chemical formula for iron(III) oxide is Fe2O3. This indicates that each iron atom is bonded to three oxygen atoms in the compound.
Chemical formula for this compound is CuO. It contains the elements Copper and Oxygen. It is a red colored compound.
The empirical formula for silicon IV oxide is SiO2, which represents the simplest whole number ratio of atoms in the compound.
The compound formula for titanium(IV) oxide is TiO2.
The chemical formula for Calcium oxide is CaO. A single calcium atom bonds with a single oxygen atom to make this compound, and a link can be found below for more information.CaO
Magnesium oxide is NOT an element.Corrected:It is an ionic compound made of two elements: Magnesium (note: correctly spelled here!) and Oxygen with formula: MgO
The compound with the formula K2O is potassium oxide. It is an ionic compound composed of potassium cations (K+) and oxide anions (O2-).
The formula Cu2O represents copper(I) oxide, which is a compound composed of copper and oxygen with a 2:1 ratio. It is a red or reddish-brown solid commonly known as cuprous oxide.
The chemical formula for iron (III) oxide is Fe2O3, where Fe represents iron and O represents oxygen.
Barium oxide is the compound with the formula BaO.
There is more than one oxide of Iron, to answer your question you need to be more specific with which oxide you are asking about.
Magnesium oxide is an ionic compound with the formula MgO.