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Chemistry: explore STEM content (page 16 of 47) · openstem

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

Explore STEM Content

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.

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Collection4 items

01Chemistry · L1 · Solid, Liquid, or Gas?

02Chemistry · L1 · Solid, Liquid, or Gas?

03Chemistry · L1 · Heating and Cooling Water

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Chemistry

Chemistry · L1 · Solid, Liquid, or Gas?

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Chemistry · L1 · Solid, Liquid, or Gas?

Collection4 items

01Chemistry · L4 · Atmospheric Chemistry — Ozone and the Greenhouse Effect

02Chemistry · L4 · Atmospheric Chemistry — Ozone and the Greenhouse Effect

03Chemistry · L4 · Greenhouse Gas Infrared Absorption and Re-emission

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Chemistry

Chemistry · L4 · Atmospheric Chemistry — Ozone and the Greenhouse Effect

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Chemistry · L4 · Atmospheric Chemistry — Ozone and the Greenhouse Effect

Note~1109 words · 6 min

Buffer calculations and capacity A buffer's qualitative behaviour — a weak acid and its conjugate base sharing the work of soaking up added acid or base — only goes so far. To actually predict a buffer's pH, and to know how much stress it c

Chemistry

Chemistry · L4 · Buffer Calculations and Capacity: Henderson–Hasselbalch, worked pH calculations, and capacity

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Chemistry · L4 · Buffer Calculations and Capacity: Henderson–Hasselbalch, worked pH calculations, and capacity

Note~548 words · 3 min

Affinity Is Not One Number — It Is Two A binding constant Ka (or its inverse, Kd) is a single equilibrium number, but it is the net result of two very different physical contributions: enthalpy (ΔH, the heat of forming specific bonds and co

Chemistry

Chemistry · L5 · Protein-Ligand Binding Thermodynamics

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Chemistry · L5 · Protein-Ligand Binding Thermodynamics

Collection4 items

01Chemistry · L4 · Integrated Rate Laws

02Chemistry · L4 · Integrated Rate Laws: concentration-time relationships, half-lives, and linearization

03Chemistry · L4 · Classifying reaction order by successive half-lives

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Chemistry

Chemistry · L4 · Integrated Rate Laws

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Chemistry · L4 · Integrated Rate Laws

Flowchart11 objects

Chemistry

Chemistry · L3 · Naming Iron Chlorides with Roman Numerals

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Chemistry · L3 · Naming Iron Chlorides with Roman Numerals

Quiz5 questions

What pigment gives red cabbage juice its pH-indicating power?

AAnthocyaninBChlorophyllCCaroteneDMelanin

Chemistry

Chemistry · L2 · Natural pH Indicators

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Chemistry · L2 · Natural pH Indicators

Flowchart13 objects

Chemistry

Chemistry · L3 · Limiting Reagents and Percent Yield · flowchart

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Chemistry · L3 · Limiting Reagents and Percent Yield · flowchart

Collection4 items

01Chemistry · L5 · Surface Chemistry and Adsorption

02Chemistry · L5 · Surface Chemistry and Adsorption

03Chemistry · L5 · Langmuir Monolayer vs BET Multilayer Adsorption

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Chemistry

Chemistry · L5 · Surface Chemistry and Adsorption

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Chemistry · L5 · Surface Chemistry and Adsorption

Flowchart7 objects

Chemistry

Chemistry · L3 · Colligative Properties · flowchart

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Chemistry · L3 · Colligative Properties · flowchart

Collection6 items

01Chemistry · L2 · Separating Mixtures

02Chemistry · L2 · Mixtures and Solutions

03Chemistry · L2 · Separating Mixtures

+3 more

Chemistry

Chemistry · L2 · Separating Mixtures

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Chemistry · L2 · Separating Mixtures

Collection4 items

01Chemistry · L4 · Mass Spectrometry: EI Fragmentation Patterns

02Chemistry · L4 · Mass spectrometry fragmentation: molecular ions, alpha cleavage, and isotope patterns

03Chemistry · L4 · Mass Spectrometry Fragmentation — 5 Q

+1 more

Chemistry

Chemistry · L4 · Mass Spectrometry Fragmentation

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Chemistry · L4 · Mass Spectrometry Fragmentation

Flowchart13 objects

Chemistry

Chemistry · L4 · Solubility equilibrium: dissolution and the common ion effect

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Chemistry · L4 · Solubility equilibrium: dissolution and the common ion effect

Collection5 items

01Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

02Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

03Chemistry · L1 · Bike Left Out vs Bike Kept Dry

+2 more

Chemistry

Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

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Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

Quiz2 questions

Which of these dissolves in water?

APebblesBSandCSaltDPlastic beads

Chemistry

Chemistry · L1 · Mixing and Dissolving

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Chemistry · L1 · Mixing and Dissolving

Note~548 words · 3 min

Spectroscopy basics: what each technique measures Spectroscopy is a family of techniques built on one idea: shine a form of energy at a sample and see what happens to it. What gets absorbed, transmitted, or emitted depends on the sample's s

Chemistry

Chemistry · L4 · Spectroscopy basics: what each technique measures

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Chemistry · L4 · Spectroscopy basics: what each technique measures

Quiz5 questions

What happens to a puddle on a hot, sunny day?

AIt freezesBIt evaporates into invisible water vaporCIt turns into a new substanceDNothing happens to it

Chemistry

Chemistry · L1 · Evaporation and Condensation

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Chemistry · L1 · Evaporation and Condensation

Quiz6 questions

Which of these sticks to a magnet?

AAluminium foilBCopper wireCIron nailDGold ring

Chemistry

Chemistry · L1 · Testing with Magnets

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Chemistry · L1 · Testing with Magnets

Flashcards8 cards

What is the fundamental limitation of ensemble spectroscopy that single-molecule spectroscopy overcomes?1 / 8

Ensemble spectroscopy measures a signal averaged simultaneously over an enormous number (typically ~10²³) of molecules, so any heterogeneity in behavior between individual molecules, or any dynamics that are not perfectly synchronized across the population, is washed out into a single smooth average signal. Single-molecule spectroscopy isolates and observes ONE molecule (or a very small number) at a time, revealing the underlying distribution of behaviors and the exact time-trajectory of individual events that the ensemble average conceals.

Chemistry

Chemistry · L5 · Single-Molecule Spectroscopy

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Chemistry · L5 · Single-Molecule Spectroscopy

Note~644 words · 3 min

One cause, three effects "Colligative" properties are properties that depend on HOW MANY particles are dissolved in a solvent — never on what those particles actually are. A teaspoon of salt and a teaspoon of sugar, dissolved so they releas

Chemistry

Chemistry · L3 · Colligative Properties

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Chemistry · L3 · Colligative Properties

Flashcards10 cards

Can plain water wash grease off a pan?1 / 10

Not very well. Grease and water do not mix, so plain water just pushes the grease around instead of washing it away.

Chemistry

Chemistry · L1 · How Soap Cleans

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Chemistry · L1 · How Soap Cleans

Flowchart11 objects

Chemistry

Chemistry · L5 · Electrocatalysis and Fuel Cells · flowchart

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Chemistry · L5 · Electrocatalysis and Fuel Cells · flowchart

Flowchart13 objects

Chemistry

Chemistry · L5 · Why a C–D Bond Needs More Energy to Break Than a C–H Bond

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Chemistry · L5 · Why a C–D Bond Needs More Energy to Break Than a C–H Bond

Plot1 plot · 1 param

Chemistry

Chemistry · L5 · Transient Absorption Exponential Decay

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Chemistry · L5 · Transient Absorption Exponential Decay

Collection4 items

01Chemistry · L5 · Advanced Mass Spectrometry

02Chemistry · L5 · Advanced Mass Spectrometry

03Chemistry · L5 · Choosing an Ionization Method: EI vs ESI/MALDI

+1 more

Chemistry

Chemistry · L5 · Advanced Mass Spectrometry

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Chemistry · L5 · Advanced Mass Spectrometry

Note~241 words · 1 min

Why Salt Melts Sidewalk Ice Faster In winter, you might see people sprinkle salt on icy sidewalks and steps. Why salt, and not just any powder? Salt Changes the Freezing Temperature Plain water freezes at a certain temperature. But when you

Chemistry

Chemistry · L1 · Why Salt Melts Sidewalk Ice Faster

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Chemistry · L1 · Why Salt Melts Sidewalk Ice Faster

Flowchart9 objects

Chemistry

Chemistry · L4 · Finding the crossover temperature (CaCO₃ decomposition)

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Chemistry · L4 · Finding the crossover temperature (CaCO₃ decomposition)

Note~595 words · 3 min

Entropy and the second law: why things spread out Entropy is a way of measuring how spread out or disordered energy and matter are. A neat, concentrated arrangement has LOW entropy; a jumbled, spread-out arrangement has HIGH entropy. You do

Chemistry

Chemistry · L3 · Entropy and the Second Law

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Chemistry · L3 · Entropy and the Second Law

Flowchart19 objects

Chemistry

Chemistry · L2 · Groups, Periods, and the Transition Metals

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Chemistry · L2 · Groups, Periods, and the Transition Metals

Quiz6 questions

Which gas makes up the largest share of the air?

AOxygenBNitrogenCCarbon dioxideDArgon

Chemistry

Chemistry · L2 · Gases in the Air

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Chemistry · L2 · Gases in the Air

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