Glucose, one of the main sources of energy used by living organisms, has a molecular mass of 180.2g. Chemical analysis shows that glucose is 40.0% C, 6.71% H and 53.3% O. Determine glucose’s molecular formula.

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.