Harrying Gaby for the feene Methode
63
11
41
A compound is 39.90% Carbon, 53,40% Oxygen, and 6.70% Hydrogen. What is this
compound's empirical formula?
COH2
COH
CO2H2
C20H2

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.