Template:Format molecular formula
This template requires an unnamed parameter (plain text molecule representation to format as wikitext).

Usage
{{Format molecular formula|H2O}}
gives the molecular formula for water (H2O
).
Example arguments: H2O (above), CO2 (CO2 ), H6C2O (H6C2O ), H2SO4 (H2SO4 ).
The Lua module just puts "<sub></sub>" tags in the wanted spots.
Similar templates
{{Format ion formula}}, for ion chemical formulas.