42.
The formula for pentaphosphorus triiodide is PI3.
The chemical formula for pentaphosphorus trichloride is P5Cl3.
There is no correct name for this NON existing compound, sorry.But according to IUPAC nomenclature rules it would have been: penta-phosphor deca-oxide.But maybe you have mistyped the formula:Phosphorus pentoxide is a chemical compound with molecular formula P4O10, earlier thought to be P2O5, hence its old name (di)Phosphorus pentoxide
The chemical formula for chloride heptoxide is Cl2O7.
The chemical name for P4O7 is tetraphosphorus heptoxide.
The formula for pentaphosphorus triiodide is PI3.
The chemical formula for pentaphosphorus trichloride is P5Cl3.
The formula for nonanitrogen heptoxide is N9O7.
The formula Cl2O7 is dichlorine heptoxide, a chemical compound. The boiling point of dichlorine heptoxide is 179.6 degrees Fahrenheit, which is 82 degrees Celsius.
There is no correct name for this NON existing compound, sorry.But according to IUPAC nomenclature rules it would have been: penta-phosphor deca-oxide.But maybe you have mistyped the formula:Phosphorus pentoxide is a chemical compound with molecular formula P4O10, earlier thought to be P2O5, hence its old name (di)Phosphorus pentoxide
Dichlorine Heptoxide
The chemical formula for chloride heptoxide is Cl2O7.
The chemical name for P4O7 is tetraphosphorus heptoxide.
Dichlorine heptoxide is the anhydride of perchloric acid. Cl2O7 + H2O ---> 2HClO4
Cl2O7 is called dichlorine heptoxide.
Disulfur heptoxide
The chemical formula for dibromine heptoxide is Br2O7.