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 = 2 x 12.011gMass
of H = 6 x 1.008 gMass
of O = 1 x 15.999 g Mass of 1 mole of C2H5OH = ??
C2H5OH