How many moles of Neon gas are there if 25.0 Liters of the gas are at 278K and pressure of 89.9 KPa (R= 8.314)

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.

Why does ammonia, nh3, behave as a base when it reacts with an acid? z

Which of these elements is a metal?