The chemical formula of Magnesium IV oxide is: MgO.
****************2nd Opinion ******************
Magnesium doesn't form +4 ions, so I'm thinking the original question was probably about manganese(IV) oxide, which would be MnO2.
Mercury(II) oxalate: HgC2O4
Formula: Hg2C2O4
MgC2O4
Hg(OH)2
The formula is Be(COO)2.
Nh3(c2o4)2 . H2o
If you think to mercury nitride the chemical formula is Hg3N2.
It is HgSMercury sulfide, mercuric sulfide, mercury sulphide, or mercury(II) sulfide is a chemical compound composed of the chemical elements mercury and sulfur.It is represented by the chemical formula HgS.It is virtually insoluble in water.
The chemical formula is HgNO3.
The chemical formula of zinc oxalate is C2O4Zn.
For example sodium oxalate has the chemical formula Na2C2O4.
The chemical formula for Calcium Oxalate is CaC2O4
Formula: FeC2O4
The formula of iron(III) oxalate is C6Fe2O12.
Formula of ammonium oxalate monohydrate: (NH4)2C2O4.H2O
Formula: (NH4)2C2O4
The formula is Be(COO)2.
Bac2o4
Cu2O. Cuprous is Cu+, cupric is Cu2+. Those are old-school names. Copper(I) oxide is a better name.
Ammonium oxalate monohydrate is (NH4)2C2O4•H2O
(NH4)2C2O4 is the chemical formula ammonium oxalate.