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H2o

I know that 70% of the human body is composed of H2O, but the tall drink of water I'm looking at is probably 97%.
Two chemists walk into a bar. The first says, "Can I have a glass of H2O?" The second chemist says, "Can I have a glass of water, too?" The first chemist breaks down in tears — his assassination attempt has failed.
(He didn't say H2O2)
If H2O is the formula for water, what is the formula for ice? H2O cubed.
Two chemists walk into a bar. The first says “I’ll take a glass of H2O.” The second says “I’ll take a glass of H2O too.”