22:5522:55, 27 August 2011diffhist+38
Lead
→Elemental lead: Add electrons to chem equations for lead/acid battery. This a) balances charge, and b) illustrates why the reaction provides an electric current.
21:0421:04, 17 August 2009diffhist+80
Azeotrope
Adding back documented statistic about the number of known azeotropes (was deleted from a previous version)