How many moles of Na2SO4 are present in 284.078 grams of Na2SO4?
A. 2
B. 3
C. 5
D. 6

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.

Which statement best describes the flow of energy in this scenario

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy