nah, I'll think about more stuff tomorrow. Had a very long day today...

I can't make sense of the question, but I have a feeling that the answer would just be a hint... we could probably do without:

:: chemistry.stackexchange.com/q/55551/4945 del m.

Classic Q&H, would delete:

:: chemistry.stackexchange.com/q/61273/4945 del m.

@Martin-マーチン Delete, Delete

chemistry.stackexchange.com/q/63460/23561 will roomba

^Delete Q&A