World 4 · Equilibrium · 6 min · PROLe Chatelier: add a reactant
The box pushes back
PRO · Particle Lab
World 4: Equilibrium is part of PRO
The first world of Particle Lab is free. PRO opens the other 17 lessons in 4 worlds — simulations, quizzes and all.
PRO includes
- All 26 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly