Stoichiometry Calculator
Solve any stoichiometry problem from a balanced equation — compute moles, mass, gas volume (ideal gas), and solution amounts for every reactant and product, with limiting reagent finder, percent yield, and mass-conservation verification
Use →, =>, -> or = as the arrow. Supports parentheses like Ca(OH)2 and hydrates like CuSO4·5H2O.
✓ Equation is balanced
Known Quantity
g
applies to products
Stoichiometric Amounts
| Side | Species | M (g/mol) | Moles | Mass (g) | Gas @ STP (L) |
|---|---|---|---|---|---|
| REACTANTGIVEN | 2Al | 26.982 | 3.706e-1 | 10.000 | 8.307 |
| REACTANT | Fe2O3 | 159.687 | 1.853e-1 | 29.591 | 4.154 |
| PRODUCT | Al2O3 | 101.961 | 1.853e-1 | 18.894 | 4.154 |
| PRODUCT | 2Fe | 55.845 | 3.706e-1 | 20.697 | 8.307 |
Mass Conservation Check
✓ Σ reactant mass = 39.5914 g · Σ product mass (theoretical) = 39.5914 g · diff = 7.11e-15 g
Limiting Reagent Finder
Enter the mass (g) of each reactant. Tool finds which one runs out first and computes the actual extent.
| Reactant | Moles | ξᵢ = n/ν | Excess / Remaining |
|---|---|---|---|
| Al | 0.3706 | 0.1853 | 0.2454 mol (6.62 g) |
| Fe2O3(LIM) | 0.0626 | 0.0626 | 0 |
About Stoichiometry
Stoichiometry uses the balanced equation's mole ratios to compute amounts of all reactants and products from any known quantity. The extent of reaction ξ (xi) equals Δnᵢ / νᵢ, where νᵢ is the stoichiometric coefficient. All species react in the same extent, so moles of species j = ξ × νⱼ.
Common Conversions
moles = mass / Mmoles = PV / RT(ideal gas)moles = V × C(solution)- 1 mol gas @ STP = 22.414 L
- R = 0.08206 L·atm/(mol·K)
Uses IUPAC 2021 standard atomic weights. Ideal-gas assumption applies; real gases deviate at high pressure / low temperature.
Continuer à explorer
Autres outils Calculatrices qui pourraient vous plaire…
Calculateur de pourcentage
Calculez des pourcentages, variations et parts du total instantanément
Calculatrice scientifique
Calculatrice scientifique complète avec trigonométrie, logarithmes et plus
Calculateur de statistiques
Calculez moyenne, médiane, mode, écart-type et variance depuis vos données
Calculateur de fractions
Additionnez, soustrayez, multipliez et divisez des fractions avec les étapes de résolution
Calculateur d'âge
Calculez l'âge exact en années, mois et jours depuis une date de naissance
Dog / Cat Age Calculator
Convert your dog or cat's age to human years based on species, size, and AVMA guidelines
Calculateur de moyenne (GPA)
Calculez votre moyenne générale depuis les notes et les heures de crédit
Calculateur de sous-réseau
Calculez les masques de sous-réseau, adresses réseau et plages d'hôtes pour des IPs