If it Fe2(SO4)3 ... That is what you need to know for chem class. Among chemists, i guess to make it easier for data-storage purposes (like when making an industrial order).. i have also seen it like this.. Fe2S3O12 ... But that wont help you for the exam. You MUST know that a sulphate (SO4)3- and a sulphite (SO3)-3 BOTH have a -3 charge.
Fe2O3 (diiron trioxide) is a chemical compound not am element.
The prefix di means two, and tri means three, so you have 2 Arsenic and 3sulfur, which comes to Ar2S3.
The compound formula for silver hydride is AgH.
This is the chemical formula (empirical formula) or the formula unit of this compound.
C7H14O is the formula for the compound.
The compound formula for silver hydride is AgH.
The compound formula of sodium phosphite is Na3PO3.
The compound formula for potassium iodide is KI.
The compound formula for phosphorus tribromide is PBr3.
The compound formula for silver phosphide is Ag3P.
The compound formula for tricarbon octahydride is C3H6.
The compound formula for silver hydroxide is AgOH.