Stoichiometry laboratory
Move from mass to moles, particles, limiting reagents, yield and formulas with every step visible.
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Scientific learning path
- 01UnderstandLive
- 02ExploreLive
- 03ExperimentLive
- 04ObserveLive
- 05ExplainLive
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Explanation mode
mass ⇄ moles ⇄ particles
Description of this simulation
18.015 g is 1.0000 mol or 6.022e+23 representative particles.
Quick test · 3 questions
- Amount (mol)
- 1.00000
- Representative particles
- 6.0221e+23
- Avogadro constant (mol⁻¹)
- 6.02214076e+23
Learning guide
- Learning objective
- Relate measurable mass to chemical amount, reaction ratios and formulas.
- Core equation
- n = m/M; N = nNₐ; extent = min(nᵢ/νᵢ)
- Why the result changes
- A balanced equation gives ratios of moles, not ratios of grams; molar mass is the bridge.
- Try this challenge
- Give oxygen in excess, then reduce hydrogen until the limiting reagent changes.
- Sources
- IUPAC Gold Book; CODATA 2022; CRC Handbook
What this model shows — and what it simplifies
Educational ModelEvery number is recalculated from amount of substance, stoichiometric coefficients and conservation of atoms.
Where do we see this in real life?
Manufacturers use this arithmetic to purchase feedstock, size reactors, predict output and find waste.
Explain this result
Scientific review record
Building- Module version
- v1 bundled
- Published
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- Last reviewed
- Not yet verified
- Academic level
- School
- Reviewer
- Not publicly assigned
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