A compound found in an oil extracted from the leaves of a tree is isolated for study. It is found to contain carbon, hydrogen, and oxygen. Combustion analysis determines that the compound is 77.87% C and 11.76% H. What is the empirical formula of the unknown compound?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.