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Chemistry: explore STEM content (page 42 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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MoleculeO=C=O

Chemistry

Chemistry · L4 · Carbon Dioxide (CO₂)

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Chemistry · L4 · Carbon Dioxide (CO₂)

MoleculeC

Chemistry

Chemistry · L3 · Methane (CH₄)

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Chemistry · L3 · Methane (CH₄)

MoleculeCN1C=NC2=C1C(=O)N(C(=O)N2C)C

Chemistry

Chemistry · L3 · Caffeine

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Chemistry · L3 · Caffeine

Flowchart10 objects

Chemistry

Chemistry · L5 · Elementary Steps of Organometallic Catalysis

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Chemistry · L5 · Elementary Steps of Organometallic Catalysis

Flowchart15 objects

Chemistry

Chemistry · L1 · Which Bin Does It Go In?

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Chemistry · L1 · Which Bin Does It Go In?

Note~269 words · 1 min

What Is Air Made Of? Air feels like nothing, but it is not a single substance — it is a mixture of several gases, each doing its own job. The proportions barely change from place to place, which is why scientists can give air a fairly fixed

Chemistry

Chemistry · L2 · Gases in the Air

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Chemistry · L2 · Gases in the Air

Collection4 items

01Chemistry · L3 · Naming and Writing Ionic Formulae

02Chemistry · L3 · Naming and Writing Ionic Formulae

03Chemistry · L3 · Naming Iron Chlorides with Roman Numerals

+1 more

Chemistry

Chemistry · L3 · Naming and Writing Ionic Formulae

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Chemistry · L3 · Naming and Writing Ionic Formulae

Flowchart15 objects

Chemistry

Chemistry · L3 · Why Some Plastics Recycle More Easily

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Chemistry · L3 · Why Some Plastics Recycle More Easily

Flashcards10 cards

What is an alloy?1 / 10

An alloy is a mixture of a metal with one or more other elements — often another metal, sometimes carbon. It's mixed on purpose to give the metal better properties than it would have on its own.

Chemistry

Chemistry · L2 · Alloys — Mixing Metals for a Purpose

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Chemistry · L2 · Alloys — Mixing Metals for a Purpose

Flowchart9 objects

Chemistry

Chemistry · L3 · Naming an Ester from Acid + Alcohol

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Chemistry · L3 · Naming an Ester from Acid + Alcohol

Quiz6 questions

What has to be true of a semiconductor particle's size, relative to the exciton Bohr radius, for quantum confinement effects to become significant?

AThe particle must be much larger than the exciton Bohr radiusBThe particle must be smaller than the exciton Bohr radiusCThe particle's size relative to the exciton Bohr radius makes no differenceDThe particle must exactly equal the exciton Bohr radius, and no other size works

Chemistry

Chemistry · L5 · Nanomaterials and Quantum Confinement

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Chemistry · L5 · Nanomaterials and Quantum Confinement

Flashcards10 cards

What happens to a puddle on the sidewalk after a sunny afternoon?1 / 10

It slowly disappears — the water evaporates into the air.

Chemistry

Chemistry · L1 · Evaporation and Condensation

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Chemistry · L1 · Evaporation and Condensation

Quiz5 questions

What happens when you pour oil and water into the same jar and let it sit?

AThey mix into one liquid foreverBThey separate into two layersCThe water disappearsDThe oil sinks to the bottom

Chemistry

Chemistry · L1 · Oil and Water Don't Mix

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Chemistry · L1 · Oil and Water Don't Mix

Flashcards10 cards

Why does a sliced apple turn brown?1 / 10

Air touches the inside of the apple where it was cut. That slowly turns the flesh brown.

Chemistry

Chemistry · L1 · Colors That Change

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Chemistry · L1 · Colors That Change

Collection3 items

01Chemistry · L5 · Total Synthesis Strategy

02Chemistry · L5 · Total Synthesis Strategy

03Chemistry · L5 · Total Synthesis Strategy

Chemistry

Chemistry · L5 · Total Synthesis Strategy

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Chemistry · L5 · Total Synthesis Strategy

Quiz5 questions

What two problems does a molecular docking program solve for each candidate compound?

AOnly the ligand's molecular weight and solubilityBSearch (finding the ligand's binding pose) and scoring (estimating that pose's binding affinity)COnly synthesizing the compound computationallyDOnly predicting the compound's toxicity

Chemistry

Chemistry · L5 · Computational Docking & Drug Design

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Chemistry · L5 · Computational Docking & Drug Design

Quiz5 questions

In the half-reaction method for acidic solution, in what order should O and H be balanced relative to balancing non-O/H atoms?

ABalance non-O/H atoms first, then O with H2O, then H with H+BBalance H with H+ first, then O, then all other atomsCBalance charge first, before any atomsDThe order does not matter

Chemistry

Chemistry · L4 · Balancing Redox Equations & Redox Titrations — 5 Q

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Chemistry · L4 · Balancing Redox Equations & Redox Titrations — 5 Q

Flowchart12 objects

Chemistry

Chemistry · L5 · Single-Molecule Spectroscopy · flowchart

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Chemistry · L5 · Single-Molecule Spectroscopy · flowchart

Flowchart19 objects

Chemistry

Chemistry · L3 · Polymer Structure and Properties · flowchart

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Chemistry · L3 · Polymer Structure and Properties · flowchart

Note~872 words · 4 min

EDTA Complexometric Titration Formation constants (Kf) show that a ligand can bind a metal ion strongly enough to pull an otherwise-unfavourable equilibrium along with it. Complexometric titration puts that same chemistry to direct, quantit

Chemistry

Chemistry · L4 · EDTA Complexometric Titration

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Chemistry · L4 · EDTA Complexometric Titration

Flashcards10 cards

What is one of the two big patterns that make transition metals (like iron, copper, chromium, and manganese) stand out from main-group metals (like sodium and magnesium)?1 / 10

Most transition metals can exist in more than one oxidation state across different compounds — for example, iron forms both Fe²⁺ and Fe³⁺ compounds. A main-group metal like sodium or magnesium essentially only ever forms one fixed oxidation state (Na⁺, Mg²⁺).

Chemistry

Chemistry · L3 · Transition Metals — Variable States and Color

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Chemistry · L3 · Transition Metals — Variable States and Color

Flowchart7 objects

Chemistry

Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step · flowchart

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Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step · flowchart

Quiz6 questions

In the word equation 'magnesium + oxygen → magnesium oxide', which substances are the reactants?

AMagnesium oxide onlyBMagnesium and oxygenCOxygen onlyDThere are no reactants shown

Chemistry

Chemistry · L2 · Chemical Reactions & Word Equations

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Chemistry · L2 · Chemical Reactions & Word Equations

Quiz5 questions

What does a corrosive hazard symbol warn you about?

AThe substance catches fire easilyBThe substance can damage skin, eyes, or metal on contactCThe substance makes other materials burn more fiercelyDThe substance is harmless in small amounts

Chemistry

Chemistry · L2 · Chemical Safety and Hazard Symbols

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Chemistry · L2 · Chemical Safety and Hazard Symbols

Quiz5 questions

Which subatomic particle has a negative charge and is found outside the nucleus, in the electron shells?

AProtonBNeutronCElectronDNucleus

Chemistry

Chemistry · L3 · Atomic Structure & Electron Configuration Quiz

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Chemistry · L3 · Atomic Structure & Electron Configuration Quiz

Quiz5 questions

What color is a dilute aqueous solution of Fe²⁺?

AYellow-brownBPale greenCDeep blueDPink

Chemistry

Chemistry · L4 · Transition Metal Chemistry in Solution — 5 Q

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Chemistry · L4 · Transition Metal Chemistry in Solution — 5 Q

Flowchart13 objects

Chemistry

Chemistry · L3 · Electrolysis · flowchart

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Chemistry · L3 · Electrolysis · flowchart

Collection6 items

01Chemistry · L2 · Gases in the Air

02Chemistry · L2 · Gases in the Air

03Chemistry · L2 · What's in the Air?

+3 more

Chemistry

Chemistry · L2 · Gases in the Air

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Chemistry · L2 · Gases in the Air

Flowchart7 objects

Chemistry

Chemistry · L3 · Avogadro's Law: Same Volume, Same Moles

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Chemistry · L3 · Avogadro's Law: Same Volume, Same Moles

Flashcards8 cards

What is a carbene, and what are its two possible spin states?1 / 8

A carbene is a neutral carbon species with only six valence electrons and two non-bonding electrons on that carbon, making it strongly electrophilic and highly reactive. Those two non-bonding electrons can occupy the same orbital with paired spins (singlet carbene, one filled sp²-like orbital and one empty p orbital) or occupy two different orbitals with parallel spins (triplet carbene, effectively a 1,1-diradical) — the two spin states have distinct geometries, reactivities, and selectivities.

Chemistry

Chemistry · L5 · Carbene Chemistry

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Chemistry · L5 · Carbene Chemistry

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