Ni(NO3)2 but has 6 waters of hydration so more properly, Ni(NO3)2.6H2O.
Formula for nickel (lll) cyanide: NiCN3
It is simply NiCl2.
Ni(CN)2
Ni(CN)3
Tin (II) cyanide has the formula Sn(CN)2.
The chemical formula (not symbol) is NiBr2.
NiBr2
Ni(MnO4)2
Nickel (II) oxalate dihydrate; used in battery production.
Tin (II) cyanide has the formula Sn(CN)2.
The chemical formula for nickel* (II) sulfate is NiSO4. *Note correct spelling.
The chemical formula (not symbol) is NiBr2.
NiBr2
Ni(MnO4)2
Nickel (II) oxalate dihydrate; used in battery production.
The formula is Cu(NO3)2 and is called Copper (II) Nitrate. See attached link for more information.
The compound nickel (II) nitride consists of a nickel ion with a +2 charge and a nitride ion with a -3 charge. Since this compound is neutral, the charges must balance. Consequently, it can be determined that the formula of nickel (II) nitride is Ni3N2.
It is Cobalt cyanide or Cobalt (ii) cyanide.
The formula for nickel(II) iodide is NiI2.
Mercury Cyanide (AKA Mercuric Cyanide)- Hg(CN)2
This compound is cobalt II cyanide.