Stoichiometry Practice Problems Explained Step by Step | Mass to Mass, Mole Ratios & More

Learn how to solve stoichiometry problems step by step in this full chemistry tutorial. In this video, we cover mass-to-mass stoichiometry, mole ratios, mole-to-mass conversions, mass-to-mole conversions, gas stoichiometry at STP, Avogadro’s number conversions, and complex stoichiometry unit maps. This lesson is designed for chemistry students taking high school chemistry, honors chemistry, AP Chemistry, general chemistry, or college chemistry. Every problem is explained clearly using dimensional analysis and balanced chemical equations so you can understand WHY each conversion works. Chapters: 00:00 Introduction to Stoichiometry 00:23 Understanding Mole-to-Mole Ratios 02:10 Building Stoichiometry Unit Maps 02:53 The Four Types of Stoichiometry Problems 04:01 Category 1: Mass to Mass Conversions 04:44 Problem 1: 5.00 g H₂ → g H₂O How many grams of H₂O are produced from 5.00 g H₂? 06:55 Problem 2: 10.0 g C₂H₆ → g CO₂ How many grams of CO₂ form when 10.0 g of C₂H₆ combusts? 09:20 Problem 3: 12.0 g Na → g NaCl How many grams of NaCl form from 12.0 g Na? 11:37 Category 2: Mole-to-Mole Conversions 12:14 Problem 4: 1.5 mol Al → mol AlCl₃ How many moles of AlCl₃ are produced from 1.5 mol Al? 13:08 Problem 5: 4.0 mol H₂ → mol H₂O How many moles of H₂O form from 4.0 mol H₂? 14:23 Problem 6: 6.0 mol NaOH → mol H₂O How many moles of H₂O form from 6.0 mol NaOH? 15:27 Category 3: Mole-to-Mass & Mass-to-Mole 16:09 Problem 7: 3.00 mol Fe → g Fe₂O₃ How many grams of Fe₂O₃ form from 3.00 mol Fe? 18:08 Problem 8: 68.0 g N₂ → mol NH₃ How many moles of NH₃ are produced from 68.0 g N₂? 19:44 Problem 9: 22.0 g CO₂ → mol O₂ How many moles of O₂ are required from 22.0 g CO₂? 21:30 Category 4: Complex Stoichiometry Conversions 22:22 Problem 10: 10.0 g H₂ → Molecules of H₂O How many molecules of H₂O form from 10.0 g H₂? 23:57 Problem 11: 5.00 g CH₄ → Liters of O₂ What volume of O₂ is required to react with 5.00 g CH₄ at STP? 25:24 Problem 12: 64.1 g SO₂ → Sulfur Atoms How many sulfur atoms are in 64.1 g SO₂? Topics Covered: • Stoichiometry basics • Mole-to-mole ratios • Mass-to-mass stoichiometry • Mole-to-mass conversions • Mass-to-mole conversions • Grams to moles chemistry problems • Molecules, atoms, and Avogadro’s number • Gas stoichiometry at STP • Combustion reactions • Limiting reactant concepts • Unit map setup and dimensional analysis Practice Problems Include: H₂ + O₂ → H₂O Combustion of hydrocarbons Na + Cl₂ → NaCl Acid-base neutralization reactions Gas volume stoichiometry Particle conversions using Avogadro’s number If stoichiometry has been confusing, this video breaks it down into simple steps you can follow for any chemistry problem. Great for: • Chemistry homework help • AP Chemistry review • Stoichiometry test prep • General chemistry students • Regents chemistry review • College chemistry practice Subscribe for more chemistry tutorials, dimensional analysis practice, mole conversion problems, balancing equations, and step-by-step chemistry problem solving.