The combustion of propane (c3h8) in the presence of excess oxygen yields co2 and h20: c3h8 (8) + 5o2 (g) - 3co2 (s) + 4h20 (8) when 2.5 mol of o2 are consumed in their reaction, a) 3.0 b) 7.5 c) 1.5 mol of co2 are produced. d) 4.2 e) 2.5

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.