After an electron releases energy (in the form of light), causing one of its electrons to move back to a lower energy level, that electron is said to be in the . A) the nucleus
B) the ground state
C) an excited state
D) an outer orbit

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?