The anhydrous form used as a drying agent is CaSO4
There are hydated forms, CaSO4 0.5H2O (plaster of paris) and CaSO4.2H2O, gypsum
Calcium sulfide is CaS. This is the empirical formula as well.
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
The calcium sulfide is CaS.
CaBr2.2H2O
Ca3P2 or Ca3(PO4)2 See related question below for more details on how to find empirical formulas.
Calcium = Ca Carbon = C oxide = O(2-) Calcium carbonate = CaCO3
Calcium Bromide
CaCo3
As an element iodine is 'I2' and calcium is 'Ca'. However, in combination it CaI2 ( Calcium Iodide.
CaCl2
CaBr2 :)
It is an empirical formula.