I think it might be the chemical formula for 1 oxygen and 2 nitrogen
Dinitrogen Teroxide = N2O4 Structure: O2N-NO2
NaOH is a strong base so it abstracts the proton from p-nitrophenol resulting in the formation of p-nitrophenoxide ion and water, but HCl is a strong acid so its conjugate base (Chloride ion) if in-case abstracts the proton from p-nitrophenol the resulting p-nitrophenoxide will accept the proton released from acid and again changes into p-nitrophenol, so there will not be any effect. Simply p-nitrophenol is also a weak acid & there will not be any reaction of it with strong hydrochloric acid.
There is no known species as N2O6. NO3 is a transient planar molecule, with an unpaired electron. N2O5 in the solid is NO2+ NO3- in the vapour and solution it is molecular, probably O2-N-O-NO2. N2O4 is a planar molecule O2N-NO2
Dinitrogen Teroxide = N2O4 Structure: O2N-NO2
NaOH is a strong base so it abstracts the proton from p-nitrophenol resulting in the formation of p-nitrophenoxide ion and water, but HCl is a strong acid so its conjugate base (Chloride ion) if in-case abstracts the proton from p-nitrophenol the resulting p-nitrophenoxide will accept the proton released from acid and again changes into p-nitrophenol, so there will not be any effect. Simply p-nitrophenol is also a weak acid & there will not be any reaction of it with strong hydrochloric acid.
There is no known species as N2O6. NO3 is a transient planar molecule, with an unpaired electron. N2O5 in the solid is NO2+ NO3- in the vapour and solution it is molecular, probably O2-N-O-NO2. N2O4 is a planar molecule O2N-NO2
Dinitrogen pentoxide (N2O5) yields dinitrogen tetroxide (N2O4) plus oxygen (O2)Oxygen, however, is normally found in a dimer when in elemental form (O2).So, unfortunately this is not a balanced equation as one starts with 5 oxygen atoms, and ends up with 6 oxygen atoms.To balance the equation, it is changed to:2N2O5 --> 2N2O4 + O2Where one has two dinitrogen pentoxide molecules yielding two dinitrogen tetroxide plus one oxygen dimer molecule.Unfortunately, this is not a very logical equation. The reason is that dinitrogen pentoxide is a very different molecule than dinitrogen tetroxide.dinitrogen pentoxide is of the form: O2N-O-NO2 where the two nitrogens are bonded to an oxygen in the middle.dinitrogen tetroxide is of the form: O2N-NO2 where the two nitrogen molecules are bonded to each other.So to convert from one to another, one would have to break the two N-O bonds in the first molecule, and magically rebuild a N-N bond in the second molecule. Not to say this couldn't happen, but it would likely be difficult to do directly.Also, note by convention, all abbreviations for chemical names will start with capital letters (N, O, Cl, etc.)