Calculate the mass percent of each element in the following compounds:

FeS2, iron(II) disulfide, pyrite Mass

percent of Fe = %

Mass percent of S = %

CH4, methane

Mass percent of C = %

Mass percent of H = %

C10H20O, menthol, found in peppermint oil

Mass percent of C = %

Mass percent of H = %

Mass percent of O = %