H2N2O2(HO-N=N-OH)+H4SIO4(SI(OH)4)H2O + H2OSO4H3PO3(HPO(OH2))H2SO4 => SO4H2OSO4 = HChemistry – A-level/undergraduate levelThis is a frustratingly inconsistent approach to writing chemical formulae. On the one hand the teacher has gone to the trouble of also using structural formulae to improve clarity (eg H2N2O2 could be nitramide, but the addition of HO-N=N-OH makes it clear that we