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OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection4 items
01Chemistry · L2 · Metals Reacting with Acids
02Chemistry · L2 · Metals Reacting with Acids
03Chemistry · L2 · The Squeaky Pop Test for Hydrogen
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Chemistry · L2 · Metals Reacting with AcidsCollection4 items
01Chemistry · L2 · Testing for Gases
02Chemistry · L2 · Testing for Gases
03Chemistry · L2 · The Four Gas Tests, Grouped
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Chemistry · L2 · Testing for GasesCollection5 items
01Chemistry · L2 · Fermentation
02Chemistry · L2 · Fermentation
03Chemistry · L2 · Fermentation vs Aerobic Respiration
+2 moreChemistry · L2 · Fermentation
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Chemistry · L2 · FermentationCollection4 items
01Chemistry · L2 · Protecting Metal Structures
02Chemistry · L2 · Protecting Metal Structures
03Chemistry · L2 · Three Ways to Protect Big Metal Structures
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Chemistry · L2 · Protecting Metal StructuresCollection5 items
01Chemistry · L2 · Energy in the Water Cycle
02Chemistry · L2 · Energy in the Water Cycle
03Chemistry · L2 · Evaporation vs Condensation on Your Skin
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Chemistry · L2 · Energy in the Water CycleCollection5 items
01Chemistry · L2 · Alloys — Mixing Metals for a Purpose
02Chemistry · L2 · Alloys — Mixing Metals for a Purpose
03Chemistry · L2 · Alloys — Pure Iron vs Steel
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Chemistry · L2 · Alloys — Mixing Metals for a PurposeCollection4 items
01Chemistry · L2 · Energy Stored in Chemical Bonds
02Chemistry · L2 · Energy Stored in Chemical Bonds
03Chemistry · L2 · Bond Energy Balance
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Chemistry · L2 · Energy Stored in Chemical BondsCollection4 items
01Chemistry · L2 · Natural pH Indicators
02Chemistry · L2 · Natural pH Indicators
03Chemistry · L2 · Making Red Cabbage Indicator at Home
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Chemistry · L2 · Natural pH IndicatorsCollection4 items
01Chemistry · L2 · Gas Pressure — the Particle Picture
02Chemistry · L2 · Gas Pressure — the Particle Picture
03Chemistry · L2 · Why Heating a Sealed Aerosol Can Is Dangerous
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Chemistry · L2 · Gas Pressure — the Particle PictureCollection5 items
01Chemistry · L2 · What Comes Out of a Flame
02Chemistry · L2 · What Comes Out of a Flame
03Chemistry · L2 · Comparing CO₂ Output From Different Fuels
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Chemistry · L2 · What Comes Out of a FlameCollection4 items
01Chemistry · L2 · Treating Water for Drinking
02Chemistry · L2 · Treating Water for Drinking
03Chemistry · L2 · Why Water Treatment Needs Four Steps
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Chemistry · L2 · Treating Water for DrinkingCollection4 items
01Chemistry · L2 · Getting Metals from Ores
02Chemistry · L2 · Getting Metals from Ores
03Chemistry · L2 · Three Ways to Extract a Metal
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Chemistry · L2 · Getting Metals from OresCollection4 items
01Chemistry · L2 · Natural and Synthetic Fibers
02Chemistry · L2 · Natural and Synthetic Fibers
03Chemistry · L2 · From Fiber to Fabric Choice
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Chemistry · L2 · Natural and Synthetic FibersCollection4 items
01Chemistry · L2 · How Batteries Work
02Chemistry · L2 · How Batteries Work
03Chemistry · L2 · Single-Use vs Rechargeable Batteries
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Chemistry · L2 · How Batteries WorkCollection4 items
01Chemistry · L2 · The Carbon Cycle
02Chemistry · L2 · The Carbon Cycle
03Chemistry · L2 · Photosynthesis vs Respiration and Combustion
+1 moreChemistry · L2 · The Carbon Cycle
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Chemistry · L2 · The Carbon CycleCollection4 items
01Chemistry · L2 · How Soap Is Made — Saponification
02Chemistry · L2 · How Soap Is Made — Saponification
03Chemistry · L2 · Curing Homemade Soap
+1 moreChemistry · L2 · How Soap Is Made — Saponification
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Chemistry · L2 · How Soap Is Made — SaponificationCollection4 items
01Chemistry · L2 · The Chemistry of Food Preservation
02Chemistry · L2 · The Chemistry of Food Preservation
03Chemistry · L2 · Comparing Food Preservation Methods
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Chemistry · L2 · The Chemistry of Food PreservationCollection4 items
01Chemistry · L2 · Electrolytes and Sports Drinks
02Chemistry · L2 · Electrolytes and Sports Drinks
03Chemistry · L2 · Sweat Loss and Sports Drink Replacement
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Chemistry · L2 · Electrolytes and Sports DrinksCollection7 items
01Chemistry · L3 · Caffeine
02Chemistry · L3 · Water (H₂O)
03Chemistry · L3 · Ethanol
+4 moreChemistry · L3 · Molecules & Reactions
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Chemistry · L3 · Molecules & ReactionsCollection10 items
01Chemistry · L3 · Reading reactions in SMILES
02Chemistry · L3 · Reactions at a glance
03Chemistry · L3 · Reactions and Structures — 5 Q
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Chemistry · L3 · Reactions in SMILESCollection5 items
01Chemistry · L3 · Atomic Structure & Electron Shells
02Chemistry · L3 · Atomic Structure & Electron Configuration Quiz
03Chemistry · L3 · Atomic Structure & Electron Shells
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Chemistry · L3 · Atomic Structure & Electron ConfigurationCollection5 items
01Chemistry · L3 · Periodic Trends
02Chemistry · L3 · Periodic Trends
03Chemistry · L3 · Why Atomic Radius Rises and Falls
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Chemistry · L3 · Periodic TrendsCollection8 items
01Chemistry · L3 · Ionic and Covalent Bonding
02Chemistry · L3 · Ionic, Covalent & Metallic Bonding
03Chemistry · L3 · How an Ionic Bond Forms (Na + Cl)
+5 moreChemistry · L3 · Ionic and Covalent Bonding
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Chemistry · L3 · Ionic and Covalent BondingCollection10 items
01Chemistry · L3 · Molecular Geometry & VSEPR
02Chemistry · L3 · VSEPR shapes
03Chemistry · L3 · VSEPR shape decision tree
+7 moreChemistry · L3 · Molecular Geometry & VSEPR
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Chemistry · L3 · Molecular Geometry & VSEPRCollection5 items
01Chemistry · L3 · Stoichiometry & the Mole
02Chemistry · L3 · Stoichiometry & the Mole — 5 Q
03Chemistry · L3 · Stoichiometry & the Mole
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Chemistry · L3 · Stoichiometry & the MoleCollection5 items
01Chemistry · L3 · Gas Laws
02Chemistry · L3 · Gas Laws
03Chemistry · L3 · Which Gas Law Do I Use?
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Chemistry · L3 · Gas LawsCollection6 items
01Chemistry · L3 · Acid–Base Titration Curve
02Chemistry · L3 · Reading a Titration Curve
03Chemistry · L3 · Titration curves
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Chemistry · L3 · Acid-Base TitrationCollection5 items
01Chemistry · L3 · Thermochemistry Basics
02Chemistry · L3 · Thermochemistry Basics
03Chemistry · L3 · Exothermic Reaction — Energy Diagram
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Chemistry · L3 · Thermochemistry BasicsCollection6 items
01Chemistry · L3 · Reaction Rates & Kinetics
02Chemistry · L3 · Reaction rates & kinetics
03Chemistry · L3 · Successful vs Unsuccessful Collision
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Chemistry · L3 · Reaction Rates & KineticsCollection5 items
01Chemistry · L3 · Chemical Equilibrium & Le Chatelier's Principle
02Chemistry · L3 · Chemical Equilibrium & Le Chatelier's Principle
03Chemistry · L3 · Reaching dynamic equilibrium
+2 moreChemistry · L3 · Chemical Equilibrium & Le Chatelier
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Chemistry · L3 · Chemical Equilibrium & Le Chatelier