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Chemistry: explore STEM content (page 10 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.

Content Groups1

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Flowchart9 objects

Chemistry

Chemistry · L3 · Gas Expanding to Fill a Container — Entropy Increase

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Chemistry · L3 · Gas Expanding to Fill a Container — Entropy Increase

Flowchart7 objects

Chemistry

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

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

Collection4 items

01Chemistry · L1 · Oil and Water Don't Mix

02Chemistry · L1 · Oil and Water Don't Mix

03Chemistry · L1 · Shaking Salad Dressing

+1 more

Chemistry

Chemistry · L1 · Oil and Water Don't Mix

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Chemistry · L1 · Oil and Water Don't Mix

Flowchart6 objects

Chemistry

Chemistry · L1 · Helium Balloon in Air vs. Cork in Water

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Chemistry · L1 · Helium Balloon in Air vs. Cork in Water

Quiz6 questions

What does a buffer solution do when a small amount of acid or base is added?

AIt resists the pH change, keeping pH roughly steadyBIt instantly neutralises the solution to pH 7CIt causes a larger pH swing than plain water would showDIt changes colour but the pH itself is unaffected

Chemistry

Chemistry · L3 · Buffers — Resisting pH Change

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Chemistry · L3 · Buffers — Resisting pH Change

Flashcards12 cards

What is a magnet?1 / 12

A magnet is a special object that pulls certain metals towards it, making them stick.

Chemistry

Chemistry · L1 · Testing with Magnets

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Chemistry · L1 · Testing with Magnets

Flowchart16 objects

Chemistry

Chemistry · L4 · Electrochemistry: standard potentials, the Nernst equation, and cell types · flowchart

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Chemistry · L4 · Electrochemistry: standard potentials, the Nernst equation, and cell types · flowchart

Flowchart11 objects

Chemistry

Chemistry · L3 · Electronegativity and Bond Polarity · flowchart

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Chemistry · L3 · Electronegativity and Bond Polarity · flowchart

Flashcards7 cards

Draw out (in words) the four groups bonded to the central alpha carbon of a generic amino acid.1 / 7

An amino group (–NH₂), a carboxylic acid group (–COOH), a hydrogen atom, and a variable side chain called the R group. All four attach to the same central carbon, the alpha carbon. This four-substituent skeleton is identical across all 20 standard amino acids — only the R group changes.

Chemistry

Chemistry · L4 · Amino Acid Structure

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Chemistry · L4 · Amino Acid Structure

MoleculeO=C=O

Chemistry

Chemistry · L2 · Carbon Dioxide (CO₂)

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Chemistry · L2 · Carbon Dioxide (CO₂)

Flowchart15 objects

Chemistry

Chemistry · L5 · Telescoped Multistep Flow Synthesis

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Chemistry · L5 · Telescoped Multistep Flow Synthesis

Flashcards9 cards

What does the ⇌ symbol mean in a chemical equation?1 / 9

The reaction is reversible — it can run forward (reactants → products) and in reverse (products → reactants) at the same time, under the same conditions.

Chemistry

Chemistry · L3 · Chemical Equilibrium & Le Chatelier's Principle

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Chemistry · L3 · Chemical Equilibrium & Le Chatelier's Principle

Flashcards8 cards

What is an exothermic reaction?1 / 8

A reaction that releases energy to its surroundings, usually as heat. The reaction mixture and container get warmer.

Chemistry

Chemistry · L2 · Exothermic Reactions

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Chemistry · L2 · Exothermic Reactions

Quiz10 questions

Which functional group is present in CH₃COOH (ethanoic acid)?

AAldehyde (–CHO)BKetone (C=O)CCarboxylic acid (–COOH)DEster (–COO–)

Chemistry

Chemistry · L4 · Organic Chemistry Basics — 10 Q

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Chemistry · L4 · Organic Chemistry Basics — 10 Q

MoleculeO

Chemistry

Chemistry · L4 · Water (H₂O)

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Chemistry · L4 · Water (H₂O)

Flowchart17 objects

Chemistry

Chemistry · L3 · Four Factors That Speed Up a Reaction

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Chemistry · L3 · Four Factors That Speed Up a Reaction

Quiz10 questions

Which set of quantum numbers is NOT valid for an electron?

An=2, l=1, mₗ=0, mₛ=+½Bn=3, l=2, mₗ=−2, mₛ=−½Cn=2, l=2, mₗ=0, mₛ=+½Dn=4, l=0, mₗ=0, mₛ=+½

Chemistry

Chemistry · L4 · Atomic Structure & Periodicity — 10 Q

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Chemistry · L4 · Atomic Structure & Periodicity — 10 Q

Note~597 words · 3 min

Protecting Metal Structures — Beyond Paint and Galvanizing A coat of paint or a galvanized zinc layer is enough to protect a garden fence or a box of nails. But ships, oil pipelines, and bridges are huge, expensive, and exposed to some of t

Chemistry

Chemistry · L2 · Protecting Metal Structures

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Chemistry · L2 · Protecting Metal Structures

Flashcards12 cards

What is an electrolyte?1 / 12

A substance that splits apart into charged particles called ions when it dissolves in water, letting the resulting solution carry an electric current.

Chemistry

Chemistry · L2 · Electrolytes and Sports Drinks

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Chemistry · L2 · Electrolytes and Sports Drinks

Quiz5 questions

According to the Boltzmann distribution, what happens to the population of a higher-energy state relative to a lower one as temperature decreases?

AIt increases, approaching equal population with the lower stateBIt decreases exponentially, concentrating population in the lower stateCIt stays exactly constant, independent of temperatureDIt oscillates periodically with 1/T

Chemistry

Chemistry · L5 · Statistical Thermodynamics

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Chemistry · L5 · Statistical Thermodynamics

Collection7 items

01Chemistry · L2 · The pH Scale

02Chemistry · L2 · pH in Everyday Life

03Chemistry · L2 · The pH Scale

+4 more

Chemistry

Chemistry · L2 · Acids, Bases & the pH Scale

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Chemistry · L2 · Acids, Bases & the pH Scale

Flashcards10 cards

What is a limiting reagent?1 / 10

The reactant that runs out first in a chemical reaction, stopping the reaction before the other reactant is fully used up. It caps the maximum amount of product that can possibly form — like running out of cheese partway through making sandwiches, even with bread left over.

Chemistry

Chemistry · L3 · Limiting Reagents and Percent Yield

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Chemistry · L3 · Limiting Reagents and Percent Yield

Flashcards11 cards

What two things do you need to make a simple homemade battery?1 / 11

Two different metals (like zinc and copper) and an electrolyte — a liquid that can carry a charge, such as salty water, lemon juice, or potato juice.

Chemistry

Chemistry · L2 · How Batteries Work

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Chemistry · L2 · How Batteries Work

Flowchart13 objects

Chemistry

Chemistry · L3 · Why Temperature Plateaus During a Phase Change

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Chemistry · L3 · Why Temperature Plateaus During a Phase Change

Flowchart9 objects

Chemistry

Chemistry · L4 · Coordination number → geometry

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Chemistry · L4 · Coordination number → geometry

Flashcards10 cards

Write the three integrated rate laws for zero-, first-, and second-order reactions, and state the units of k for each.1 / 10

Zero order: [A] = [A]₀ − kt (k in mol L⁻¹ s⁻¹). First order: ln[A] = ln[A]₀ − kt (k in s⁻¹). Second order: 1/[A] = 1/[A]₀ + kt (k in L mol⁻¹ s⁻¹). Each is a straight-line equation in a different pair of variables — that's exactly what the linearization method exploits.

Chemistry