Full Idea
'H2O' is not a description of any microstructure. It is a compositional formula, describing the combining proportions of hydrogen and oxygen to make water.
Gist of Idea
'H2O' just gives the element proportions, not the microstructure
Source
Weisberg/Needham/Hendry (Philosophy of Chemistry [2011], 4.5)
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.28