Write a net ionic equation to show how codeine, c18h21o3n, behaves as a base in water.

Actually, the ionic equation for this is a reversible equation since codeine is a weak base. Any weak base or weak acids do not completely dissociate which makes them a reversible process. The ionic equation for this case is:

C18H21O3N  +  H3O+  <=> C18H21O3NH+ +  H2O 

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.