Co(HSO4)2
Al(HSO4)3
CoCl2
Formula: Co(NO3)2
CoCl2 cobaltous chloride or cobalt(II) chloride
Hydrogen is H2, a diatomic gaseous element
Copper sulfate has CuSO4 as its formula. Copper sulfate is also written copper (II) sulfate.
Copper sulfate has CuSO4 as its formula. Copper sulfate is also written copper (II) sulfate.
There are two kinds of copper sulfate, even without considering hydrates. Cu(I) sulfate has the formula Cu2SO4 and Cu(II) sulfate has the formula CuSO4.
The formula for cobalt(II) fluoride is CoF2, where cobalt has a +2 oxidation state and fluorine has a -1 oxidation state.
The formula for magnesium {note correct spelling} sulfate is MgSO4.
Na2SO4 is the chemical formula for sodium sulfate.
The chemical formula for a sulfate anion is SO4-2.