The chemical formula for chromium (II) nitrate is Cr(NO3)2. The chromium (II) ion has a positive charge of two, and each nitrate ion contain a single negative charge; two nitrate ions can bond to form an electrically stable compound.
If the compound were to contain a chromium (III) ion instead of a chromium (II) ion, its chemical formula would be CR(NO3)3; the additional nitrate ion would be needed to balance out the positive electrical charge of chromium (III). Chromium nitrate can be produced by combining chromium oxide in nitric acid solution. The molar mass of chromium (II) nitrate is 176.0059 grams per mole. Chromium (II) nitrate finds limited uses in the dyeing industry.