Butyric acid is a compound that smells like "baby spit-up", but it can be reacted with ethyl alcohol to make artificial pineapple fragrance (ethyl butyrate). Butyric acid's percent composition is 54.53% carbon, 9.15% hydrogen, and 36.32% oxygen. Calculate its empirical formula.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.