Formula: FeC2O4
Fe(COO)2
For example sodium oxalate has the chemical formula Na2C2O4.
The chemical formula of zinc oxalate is C2O4Zn.
The chemical formula for Calcium Oxalate is CaC2O4
Formula of ammonium oxalate monohydrate: (NH4)2C2O4.H2O
The chemical formula of ferrous sulphate is FeSO4.
The formula of iron(III) oxalate is C6Fe2O12.
Ammonium oxalate monohydrate is (NH4)2C2O4•H2O
The chemical formula for molybdenum oxalate is Mo(C2O4)2.
The chemical formula for ferrous chlorite is FeCl2.
Cu2O. Cuprous is Cu+, cupric is Cu2+. Those are old-school names. Copper(I) oxide is a better name.
The chemical formula for ferric ammonium oxalate is (NH4)3Fe(C2O4)3.