World 3 · Balancing & Stoichiometry · 8 min · PROLimiting reagent
What runs out first
PRO · Chemistry Lab
World 3: Balancing & Stoichiometry is part of PRO
The first world of Chemistry Lab is free. PRO opens the other 39 lessons in 5 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