A horse runs 1 km in 15 s. What is the average speed

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

What is the mass of 8 moles of sodium atoms

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.