World 4 · Substitution & Elimination · 7 min · PROSolvent effects
The flask is a reagent too
PRO · Organic Chemistry
World 4: Substitution & Elimination is part of PRO
The first world of Organic Chemistry is free. PRO opens the other 43 lessons in 7 worlds — simulations, quizzes and all.
PRO includes
- All 26 labs — every world, every lesson
- Practice exams and certificates
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