Theoretical Yield p$-$nitroacetanilide:Concentration of sulphuric acid used: $95\%$ sulphuric acid, density $=1\mathrm{.}84$ g$/$mLConcentration of nitric acid used: $70\%$ nitric acid, density $=1\mathrm{.}413$ g$/$mL $($ii$)$ Part II: Theoretical yield of p$-$nitroaniline $($iii$)$ Parts BI & BII: Theoretical Yield of p$-$Iodonitrobenzene