Template:Chem molar mass/calc charge

({{#ifeq:{{#invoke:String|find|source={{{charge|0}}}|target=[%-%−]|plain=false}}|0|-|}}{{#invoke:String|replace|source={{#invoke:String|replace|source={{{charge|0}}}|pattern=^[%-%−%+]$|replace=1|plain=false}}|pattern=[%-%−%+%, ]|replace=|plain=false}} * 0.000548579909070){{documentation}}