碳化氫

碳 = 炭 + 石 : Tecumseh (t) further processes the charcoal (炭) he made in the anthill's bathroom (an4) into pure carbon (碳) by crushing the charcoal (炭) into its elements and exerting extreme pressure with a rock (石).

化 = 亻 + 匕 : Helga Horse and Rosa Luxemburg conduct an experiment in the ashram's bathroom. Using a transformer, they melt a ladle.

氢 = 气 + 又 + 工 : The Queen of Hearts (qi) is building a zeppelin in front of the engine ((e)ng1) by attaching a lot of hydrogen (氢) filled balloons (气) to a steel beam (工). In order not to accidentally pop a balloon with her finger nails she uses boxing gloves (又).