Please help me with this question!

What is the number of atoms in 3.54 mol s

How much energy is made when a pice of wood burns. how do you know

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.