Simple Chemistry riddle

[questionposter]

Two guys walk into a restaurant. One says "Can I have a glass of H2O?" and the other one says "I'll have H2O too". After both men receive their drinks and drink them, one of them dies. Why?

[hypervalent_iodine]

As it turns out, drinking hydrogen peroxide (i.e. H₂O₂) isn't so great for you.

[questionposter]

 

As it turns out, drinking hydrogen peroxide (i.e. H₂O₂) isn't so great for you.

 

 

Well, the pure stuff anyway.

Edited March 29, 2012 by questionposter

[Snowman]

The order was interpreted as H2O2 rather than H2O as well. This would give them hydrogen peroxide, not something you should drink, enough said.