Dihydrogen pentaoxide would mean 2 hydrogens and 5 oxygens, or H2O5. This would be an exceedingly unstable molecule, since two hydrogen atoms normally combine with only one oxygen atom, not five.
It is better known as Monopotassium phosphate, also potassium dihydrogen phosphate.
The formula for strontium combined with dihydrogen phosphate is Sr(H2PO4)2. In this compound, strontium has a 2+ charge, and the dihydrogen phosphate ion, H2PO4-, also carries a 1- charge, so two dihydrogen phosphate ions are needed to balance the charges.
The chemical formula for diphosphorous pentaoxide is P2O5.
H2O - i.e. it is water
The formula for dinitrogen pentaphosphide is N2P5
The chemical formula for dihydrogen phosphate ion is H2PO4-
The formula is ' NaH2PO4 '. The 'dihydrogen' means two(2) hydrogens.
The formula for potassium dihydrogen phosphate is KH2PO4.
The chemical formula for sodium dihydrogen phosphite is NaH2PO3.
The chemical formula for Sodium dihydrogen phosphate is NaH2PO4.
phosphorus pentaoxide or p2o5 dimerises into p4o10
Calcium dihydrogen phosphate is Ca(H2PO4)2
The formula for aluminum dihydrogen phosphate is Al(H2PO4)3.
The chemical formula for manganese dihydrogen phosphate is Mn(H2PO4)2.
The chemical formula for iron(II) dihydrogen phosphate is Fe(H2PO4)2.
The chemical formula for cupric dihydrogen phosphate is Cu(H2PO4)2.
The chemical formula for Iron (III) dihydrogen phosphate is Fe(H2PO4)3.