Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chemists spend hours on the same calculations: molar masses, moles, limiting reagents, dilutions. In this chapter you write the programs that do them for any formula and any reaction, and then turn the periodic table into a data table that you can sort, plot and search for patterns. It goes with the chapters Some Basic Concepts of Chemistry and Classification of Elements, so each program checks what you learn there.