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Chemistry: explore STEM content (page 7 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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Collection4 items

01Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder

02Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder

03Chemistry · L3 · Why Alloying Hardens a Metal

+1 more

Chemistry

Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder

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Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder

Collection3 items

01Chemistry · L4 · Heterogeneous Equilibria & Kp

02Chemistry · L4 · Heterogeneous equilibria: omitted phases, Kp, and the Kp–Kc relationship

03Chemistry · L4 · Heterogeneous Equilibria & Kp — 5 Q

Chemistry

Chemistry · L4 · Heterogeneous Equilibria & Kp

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Chemistry · L4 · Heterogeneous Equilibria & Kp

Flowchart13 objects

Chemistry

Chemistry · L2 · The Rules for Chemical Symbols

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Chemistry · L2 · The Rules for Chemical Symbols

Collection4 items

01Chemistry · L2 · Electrolytes and Sports Drinks

02Chemistry · L2 · Electrolytes and Sports Drinks

03Chemistry · L2 · Sweat Loss and Sports Drink Replacement

+1 more

Chemistry

Chemistry · L2 · Electrolytes and Sports Drinks

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Chemistry · L2 · Electrolytes and Sports Drinks

Note~462 words · 2 min

Combustion of Hydrocarbons: Complete vs Incomplete Complete Combustion: Full Oxygen, Full Burn Hydrocarbons — molecules made only of carbon and hydrogen — are widely used as fuels because burning them releases a lot of useful energy. When t

Chemistry

Chemistry · L3 · Combustion and Cracking of Hydrocarbons

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Chemistry · L3 · Combustion and Cracking of Hydrocarbons

Flowchart9 objects

Chemistry

Chemistry · L1 · Making Ice Cream the Old-Fashioned Way

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Chemistry · L1 · Making Ice Cream the Old-Fashioned Way

Note~507 words · 3 min

What Is Hard Water? Hard water is water that contains relatively high concentrations of dissolved calcium ions (Ca²⁺) and magnesium ions (Mg²⁺). As rainwater flows over and through rock, it dissolves small amounts of minerals out of that ro

Chemistry

Chemistry · L3 · Water Hardness

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Chemistry · L3 · Water Hardness

Flowchart9 objects

Chemistry

Chemistry · L1 · Air, Breathing, and Gases · flowchart

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Chemistry · L1 · Air, Breathing, and Gases · flowchart

Note~554 words · 3 min

Buried Orbitals, Electrostatic Bonding The defining structural feature of lanthanide chemistry is that the 4f orbitals, despite carrying meaningful electron density close to the nucleus, are shielded from the surrounding ligand environment

Chemistry

Chemistry · L5 · Lanthanide and Actinide Chemistry

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Chemistry · L5 · Lanthanide and Actinide Chemistry

Note~823 words · 4 min

Specific latent heat: the energy behind a phase change q = mcΔT measures heat that changes a substance's temperature within one state — heating liquid water from 20 °C to 80 °C, for example. But when a substance actually changes state — mel

Chemistry

Chemistry · L3 · Specific Latent Heat

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Chemistry · L3 · Specific Latent Heat

Flashcards8 cards

What is a metal?1 / 8

A metal is shiny and hard. Spoons, coins, and nails are made of metal.

Chemistry

Chemistry · L1 · Metals and Non-metals

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Chemistry · L1 · Metals and Non-metals

Flashcards10 cards

What does an empirical formula tell you, and what does it NOT tell you?1 / 10

An empirical formula gives the simplest whole-number ratio of atoms in a compound — it tells you the PROPORTION of each element, but not the actual number of atoms in one real molecule.

Chemistry

Chemistry · L3 · Empirical and Molecular Formula

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Chemistry · L3 · Empirical and Molecular Formula

Collection4 items

01Chemistry · L2 · The Carbon Cycle

02Chemistry · L2 · The Carbon Cycle

03Chemistry · L2 · Photosynthesis vs Respiration and Combustion

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Chemistry

Chemistry · L2 · The Carbon Cycle

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Chemistry · L2 · The Carbon Cycle

Flashcards12 cards

What is acid rain?1 / 12

Rain (or snow) that is much more acidic than normal, caused mainly by sulfur dioxide and nitrogen oxide pollution dissolving in atmospheric water vapour to form strong acids.

Chemistry

Chemistry · L3 · Acid Rain

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Chemistry · L3 · Acid Rain

Flashcards10 cards

What does it mean to recycle something?1 / 10

It means turning something old and used into something new, instead of throwing it away forever.

Chemistry

Chemistry · L1 · Sorting and Recycling Materials

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Chemistry · L1 · Sorting and Recycling Materials

Quiz5 questions

The ideal gas law PV = nRT is a combination of which three simpler laws?

ABoyle's law, Charles's law, and Avogadro's lawBBoyle's law, Graham's law, and Dalton's lawCCharles's law, Raoult's law, and Henry's lawDAvogadro's law, Hess's law, and Le Chatelier's principle

Chemistry

Chemistry · L4 · Real Gases & the Ideal Gas Law — 5 Q

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Chemistry · L4 · Real Gases & the Ideal Gas Law — 5 Q

Flashcards6 cards

In plain terms, what is vapor pressure?1 / 6

A measure of how many molecules are escaping a liquid's surface to become vapor. Liquids that evaporate easily (like rubbing alcohol) have a high vapor pressure; liquids that evaporate slowly have a low one.

Chemistry

Chemistry · L3 · Vapor Pressure Lowering

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Chemistry · L3 · Vapor Pressure Lowering

Flashcards8 cards

What is the core principle that makes isotopic labeling a mechanistic and tracing tool?1 / 8

Isotopes of the same element have (to an excellent first approximation) identical electronic structure and chemical reactivity, differing only in nuclear mass and, for radioisotopes, radioactive decay — so substituting one isotope for another (²H for ¹H, ¹³C for ¹²C, ¹⁸O for ¹⁶O, or a radioactive isotope like ¹⁴C or ³H) lets a chemist follow the FATE of a specific atom through a reaction or biological pathway using a distinguishable physical signal (mass, radioactivity, or NMR/IR shift) without meaningfully perturbing the underlying chemistry itself.

Chemistry

Chemistry · L5 · Isotope Labeling & Tracer Studies

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Chemistry · L5 · Isotope Labeling & Tracer Studies

Quiz6 questions

What fundamentally distinguishes chemiluminescence from photoluminescence (fluorescence/phosphorescence)?

AChemiluminescence never involves an excited electronic state at allBIn chemiluminescence, the excited-state product is created directly by a chemical reaction's energy release, with no photon ever absorbed; in photoluminescence, the excited state is created by absorbing a photonCChemiluminescence only occurs in living organismsDChemiluminescence releases energy exclusively as heat, never as light

Chemistry

Chemistry · L5 · Chemiluminescence

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Chemistry · L5 · Chemiluminescence

Collection5 items

01Chemistry · L2 · Energy in the Water Cycle

02Chemistry · L2 · Energy in the Water Cycle

03Chemistry · L2 · Evaporation vs Condensation on Your Skin

+2 more

Chemistry

Chemistry · L2 · Energy in the Water Cycle

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Chemistry · L2 · Energy in the Water Cycle

Flowchart23 objects

Chemistry

Chemistry · L5 · Glass Transition, Crystallinity & Chain-Structure–Property Control · flowchart

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Chemistry · L5 · Glass Transition, Crystallinity & Chain-Structure–Property Control · flowchart

Collection5 items

01Chemistry · L3 · Atomic Structure & Electron Shells

02Chemistry · L3 · Atomic Structure & Electron Configuration Quiz

03Chemistry · L3 · Atomic Structure & Electron Shells

+2 more

Chemistry

Chemistry · L3 · Atomic Structure & Electron Configuration

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Chemistry · L3 · Atomic Structure & Electron Configuration

Collection4 items

01Chemistry · L5 · Ultrafast Femtochemistry

02Chemistry · L5 · Ultrafast Femtochemistry

03Chemistry · L5 · Ultrafast Femtochemistry

+1 more

Chemistry

Chemistry · L5 · Ultrafast Femtochemistry

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Chemistry · L5 · Ultrafast Femtochemistry

Flowchart11 objects

Chemistry

Chemistry · L2 · How to Detect an Energy Change

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Chemistry · L2 · How to Detect an Energy Change

Collection5 items

01Chemistry · L5 · Battery Chemistry & Materials

02Chemistry · L5 · Battery Chemistry & Materials

03Chemistry · L5 · Lithium Dendrite Growth on a Metal Anode

+2 more

Chemistry

Chemistry · L5 · Battery Chemistry & Materials

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Chemistry · L5 · Battery Chemistry & Materials

Flashcards8 cards

What does recycling code #1 stand for, and name one common product.1 / 8

PET (polyethylene terephthalate) — used for soft-drink and water bottles.

Chemistry

Chemistry · L3 · Plastic Recycling Codes

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Chemistry · L3 · Plastic Recycling Codes

Note~259 words · 1 min

¹H NMR Chemical Shifts Chemical shift δ (ppm) reflects the local electronic environment relative to TMS (δ = 0). Key reference values: Spin–Spin Coupling: the n + 1 Rule For first-order spectra, a proton coupled to n equivalent neighbouring

Chemistry