Percent Composition
Gives the percentages of a compoundŐs mass
that are due to each of the component elements
C
2
H
5
OH
Mass of C = 24.022 g
Mass of H = 6.048 g
Mass of O = 15.999 g
Mass of 1 mole of C
2
H
5
OH = 24.022 + 6.048 + 15.999 = 46.069