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Chemistry: explore STEM content (page 41 of 47) · openstem

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Chemistry Chemistry groups

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Search the community's STEM library — free to study, yours to make your own.

Chemistry

Reactions, bonding and organic chemistry on openstem — flashcards, notes, quizzes and molecule structures shared by the community. Study free, or clone into your library.

Content Groups1

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Flowchart11 objects

Chemistry

Chemistry · L2 · Why Heating a Sealed Aerosol Can Is Dangerous

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Chemistry · L2 · Why Heating a Sealed Aerosol Can Is Dangerous

Note~930 words · 5 min

Asymmetric Catalysis Mechanisms Wilkinson's achiral hydrogenation cycle (RhCl(PPh3)3) already supplies the full mechanistic skeleton: ligand dissociation, oxidative addition, alkene association, migratory insertion, and reductive eliminatio

Chemistry

Chemistry · L5 · Asymmetric Catalysis Mechanisms: The Quadrant Model, Sharpless Epoxidation, and Organocatalysis

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Chemistry · L5 · Asymmetric Catalysis Mechanisms: The Quadrant Model, Sharpless Epoxidation, and Organocatalysis

Note~458 words · 2 min

From Batch Flasks to Continuous Flow In batch chemistry, reagents combine in one vessel and the whole pool reacts together over an extended period, with heat and mass transfer limited by the flask's surface-to-volume ratio and the efficienc

Chemistry

Chemistry · L5 · Flow Chemistry and Continuous Processing

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Chemistry · L5 · Flow Chemistry and Continuous Processing

Collection4 items

01Chemistry · L4 · Effusion, Diffusion & Graham's Law

02Chemistry · L4 · Effusion, diffusion, and Graham's law

03Chemistry · L4 · Relative effusion rate vs molar mass (Graham's Law)

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Chemistry

Chemistry · L4 · Effusion, Diffusion & Graham's Law

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Chemistry · L4 · Effusion, Diffusion & Graham's Law

Collection4 items

01Chemistry · L4 · Faraday's Laws of Electrolysis

02Chemistry · L4 · Faraday's Laws of Electrolysis: quantifying charge, moles of electrons, and mass deposited

03Chemistry · L4 · Electroplating setup: which electrode gains mass

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Chemistry

Chemistry · L4 · Faraday's Laws of Electrolysis

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Chemistry · L4 · Faraday's Laws of Electrolysis

Quiz6 questions

What is the general principle underlying every spectroscopic technique?

AMeasuring the mass of a sample after heating itBShining energy at a sample and observing what's absorbed, transmitted, or emittedCDissolving a sample in a series of solvents and comparing solubilityDMeasuring the melting point of a sample under varying pressure

Chemistry

Chemistry · L4 · Spectroscopy Basics — 6 Q

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Chemistry · L4 · Spectroscopy Basics — 6 Q

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Chemistry

Chemistry · L1 · Magnetic or Not? Sorting Materials

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Chemistry · L1 · Magnetic or Not? Sorting Materials

Flowchart9 objects

Chemistry

Chemistry · L4 · ΔG° magnitude → equilibrium constant K

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Chemistry · L4 · ΔG° magnitude → equilibrium constant K

Note~599 words · 3 min

Instrumental Chromatography: HPLC and GC Paper and TLC chromatography separate a mixture across a flat, visible surface: you can see each spot and measure how far it travelled. Instrumental chromatography does the same underlying job — sepa

Chemistry

Chemistry · L4 · Instrumental Chromatography — HPLC and GC

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Chemistry · L4 · Instrumental Chromatography — HPLC and GC

Flashcards10 cards

What is the central goal of computational chemistry?1 / 10

To find approximate solutions to the electronic Schrödinger equation for a real, many-electron molecule — cheaply enough to actually run on a computer — in order to predict structure (geometry), energy (reaction energetics, barriers), and other properties (spectra, dipole moments) without needing a closed-form exact solution, which exists only for one-electron systems.

Chemistry

Chemistry · L5 · Computational Chemistry & DFT Basics

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Chemistry · L5 · Computational Chemistry & DFT Basics

Flowchart7 objects

Chemistry

Chemistry · L4 · Coordination complexes: ligands, naming, and why they're colored · flowchart

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Chemistry · L4 · Coordination complexes: ligands, naming, and why they're colored · flowchart

Quiz6 questions

What is the chemical reaction that makes soap from a fat and lye called?

ANeutralizationBCombustionCSaponificationDFermentation

Chemistry

Chemistry · L2 · How Soap Is Made — Saponification

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Chemistry · L2 · How Soap Is Made — Saponification

Flowchart18 objects

Chemistry

Chemistry · L5 · Advanced NMR: 2D Techniques & Coupling Analysis · flowchart

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Chemistry · L5 · Advanced NMR: 2D Techniques & Coupling Analysis · flowchart

Collection12 items

01Chemistry · L5 · Quantum Chemistry & MO Theory

02Chemistry · L5 · Advanced Organic Mechanisms & Retrosynthesis

03Chemistry · L5 · Chemical Kinetics: Eyring & Arrhenius Equations

+9 more

Chemistry

Chemistry · L5 · Quantum & Physical Chemistry

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Chemistry · L5 · Quantum & Physical Chemistry

Quiz6 questions

What is the general word equation for a metal reacting with an acid?

Ametal + acid → salt + oxygenBmetal + acid → salt + hydrogenCmetal + acid → salt + waterDmetal + acid → oxide + hydrogen

Chemistry

Chemistry · L2 · Metals Reacting with Acids

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Chemistry · L2 · Metals Reacting with Acids

Note~661 words · 3 min

Same monomer, very different plastic HDPE (high-density polyethylene, recycling code #2) and LDPE (low-density polyethylene, recycling code #4) are both built from exactly the same monomer, ethene. Yet HDPE is rigid enough for a hard hat, w

Chemistry

Chemistry · L3 · Polymer Structure and Properties

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Chemistry · L3 · Polymer Structure and Properties

Flowchart9 objects

Chemistry

Chemistry · L1 · The Magnet Test

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Chemistry · L1 · The Magnet Test

Collection4 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

+1 more

Chemistry

Chemistry · L2 · Gas Pressure — the Particle Picture

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Chemistry · L2 · Gas Pressure — the Particle Picture

Collection5 items

01Chemistry · L4 · Coordination Chemistry

02Chemistry · L4 · Coordination complexes: ligands, naming, and why they're colored

03Chemistry · L4 · Naming a coordination complex, step by step

+2 more

Chemistry

Chemistry · L4 · Coordination Chemistry

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Chemistry · L4 · Coordination Chemistry

MoleculeC=C

Chemistry

Chemistry · L3 · Ethene (Ethylene)

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Chemistry · L3 · Ethene (Ethylene)

Quiz5 questions

Which state of matter always keeps its own shape?

AGasBLiquidCSolidDNone of them

Chemistry

Chemistry · L1 · Solid, Liquid, or Gas?

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Chemistry · L1 · Solid, Liquid, or Gas?

Flashcards11 cards

What is enthalpy change (ΔH) and how do you classify a reaction as exothermic or endothermic?1 / 11

ΔH = H_products − H_reactants (at constant pressure). Exothermic: ΔH < 0 (releases heat, e.g. combustion). Endothermic: ΔH > 0 (absorbs heat, e.g. dissolving NH₄NO₃). ΔH is independent of path (Hess's law).

Chemistry

Chemistry · L4 · Thermochemistry & Chemical Equilibrium

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Chemistry · L4 · Thermochemistry & Chemical Equilibrium

Flashcards11 cards

What is combustion analysis, in one sentence?1 / 11

An analytical technique for finding the formula of an unknown organic compound (containing only C, H, and possibly O): a known mass of the sample is burned completely in excess oxygen, and the carbon dioxide and water produced are separately trapped and weighed.

Chemistry