I heard a good chemist joke toady and thought you'd appreciate it:
Two chemists walk into a bar.
The first one says to the bartender, "give me a glass of H2O."
The second chemist says to the bartender, "I'll take a glass of H2O too."
The second chemist dies.
ETA:
Also funny-
Little Johnny's dead and gone,
His eyes will see no more.
For what he thought was H2O,
Was H2SO4.