Outil Chimie Rapide & Précis
Convertisseur Grammes & Moles
Entrez n'importe quelle formule chimique pour calculer sa masse molaire, sa composition élémentaire et le nombre d'atomes avec une précision de 4 décimales.
118
118 ĂlĂ©ments
Nâ
4 DĂ©cimales
100%
100% CÎté Client
Masse Molaire
Les 118 éléments · Poids atomiques IUPAC 2021
Exemples rapides:
Entrez une formule ci-dessus pour calculer la masse molaire
Guide Ă©tape par Ă©tape
Comment calculer la masse molaire
Calculez la masse d'une formule chimique en trois Ă©tapes simples.
Input a Chemical Formula
Type any chemical formula â HâO, CâHââOâ, NaOH, or even complex structures with parentheses and brackets. The molar mass calculator identifies each element, resolves nested groups, and counts every atom. All 118 elements from the periodic table are supported.
NaOH
â
Na Ă 1O Ă 1H Ă 1
FAQ
Foire Aux Questions
RĂ©ponses aux questions courantes sur la masse molaire et les formules chimiques.
Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol).
To calculate molar mass: (1) identify each element in the formula, (2) look up each element's standard atomic weight from the IUPAC periodic table, (3) multiply each atomic weight by its atom count, and (4) sum all products.
The Avogadro constant (Nâ) is exactly 6.02214076 Ă 10ÂČÂł molâ»Âč, as defined by the 2019 redefinition of SI units.
Use the formula: moles = mass (g) Ă· molar mass (g/mol).
Numerically, yes â molar mass and molecular weight have the same value.
Ionic compounds like NaCl don't form discrete molecules, so technically we use 'formula mass' rather than 'molecular mass.' However, the molar mass calculation is identical: sum the atomic weights of all atoms in one formula unit.
This calculator provides molar mass values to 4 decimal places using IUPAC 2021 standard atomic weights.