Whichever value is most likely to be the ph of a salt that is formed by the reaction of a weak acid and a strong base

In 2002, the rare earth elements mine in mountain pass, california was closed because

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 electron configuration represents the electrons in an atom of sodium in the ground state at stp