Organic Chemistry and Physical Chemistry are the hardest chemistry classes, and they require different skill sets.
Harvey Mudd 也有 蛮 rigorous 的 Core Curriculum, 以前其中一门必修课是 Physical Chemistry。忘了是在 Quora 还是在哪里看过, 后来一些族裔的学生抗议, 说它的 Core 太难, Mudd 只好把 Physical Chemistry 从 Core Curriculum 里除掉。