Molar Mass – Kalkulačka

Jak používat tuto kalkulačku

1. Zadejte Chemical Formula (e.g. H2O, NaCl, C6H12O6)
2. Klikněte na tlačítko Vypočítat
3. Přečtěte si výsledek zobrazený pod kalkulačkou

What Is Molar Mass?

Molar mass is the mass of one mole (6.022 × 10²³ particles) of a substance, expressed in grams per mole (g/mol). It equals the sum of the atomic masses of all atoms in one molecule of the compound.

For example, water (H₂O) has a molar mass of 2 × 1.008 + 15.999 = 18.015 g/mol. This means 18.015 grams of water contains exactly one mole (6.022 × 10²³ molecules) of H₂O.

How to Calculate Molar Mass

1. Write the chemical formula (e.g., NaCl, C₆H₁₂O₆). 2. Identify each element and its count. 3. Multiply each element's atomic mass by its subscript. 4. Sum all values.

Example for glucose (C₆H₁₂O₆): C: 6 × 12.011 = 72.066; H: 12 × 1.008 = 12.096; O: 6 × 15.999 = 95.994. Total = 180.156 g/mol.

Molar Mass in Chemical Calculations

Molar mass is essential for stoichiometry — converting between grams and moles in reactions. Formula: Moles = Mass (g) ÷ Molar mass (g/mol).

If you have 36.03 g of water, that's 36.03 ÷ 18.015 = 2.00 moles. This is the foundation of quantitative chemistry, used in labs worldwide for solution preparation, reaction yield calculations, and titrations.

Frequently Asked Questions