Select all the species that are ions. NaCl
H 3 O +
HCl
NH 4+
CCl 4
H 2 PO 4-
This is multiple answered please help!!

What does the cell nucleus do or, how does it function?

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.

Determine type of reaction & predict the product c3h12+o2 =