Core Quantitative Chemistry: Formula
Slide 4 of 37
From Molecular to Empirical formula
Molecular formula  Empirical formula
N2O4 NO2
P4O6  P2O3
C2H4 CH2
Mn2O3 Mn2O3
C6H12O6  CH2O
  H2O H2O
CO2 CO2 
HNO3   HNO3 
(NH4)2SO4 (NH4)2SO4
Fe2O3  Fe2O3