How many moles are in 3.45 x 10^22 formula units of potassium hydroxide?

When the pressure that a gas exerts

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.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.