Percent
Composition
Defn:
The percentages of a compoundŐs mass that 
are due to
each of the component elements.
are due to
each of the component elements.Mass
of C = 24.022 gMass
of H = 6.048 gMass
of O = 15.999 g Mass of 1 mole of C2H5OH = 24.022
+ 6.048 + 15.999 = 46.069g
C2H5OH