Notez "*" inmultire si "/" impartire:
MC6H6=78g/mol
MH2SO4=98g/mol
MHNO3=63g/mol
p=mpur/mipur*100===>mpur=p*mimp/100=78*300/100=234g C6H6
78g............63g
C6H6 + HO-NO2/H2SO4 --->C6H5-NO2 + H2O
234g...........x=189g HNO3(md)
Cp=md/ms*100 ===>ms=md*100/Cp=189*100/80=236.25g HNO3