Chemical Molar Mass Calculator

Molar Mass Formula:

\[ \text{Molar Mass} = \sum (\text{Atomic Masses} \times \text{Counts}) \]

Molar Mass:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Molar Mass?

Molar mass is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property defined as the mass of a given substance divided by the amount of substance in grams per mole (g/mol).

2. How Does the Calculator Work?

The calculator uses the molar mass formula:

\[ \text{Molar Mass} = \sum (\text{Atomic Masses} \times \text{Counts}) \]

Where:

Atomic Masses — Standard atomic weights of elements (g/mol)
Counts — Number of atoms of each element in the molecule

Explanation: The calculator sums the products of each element's atomic mass and its count in the molecule.

3. Importance of Molar Mass

Details: Molar mass is essential for stoichiometric calculations, converting between mass and moles of a substance, preparing solutions with specific concentrations, and determining empirical and molecular formulas.

4. Using the Calculator

Tips: Enter elements and their counts in the format "Element:Count" separated by commas. For example:

Water (H₂O): "H:2, O:1"
Glucose (C₆H₁₂O₆): "C:6, H:12, O:6"
Sulfuric acid (H₂SO₄): "H:2, S:1, O:4"

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between atomic mass and molar mass?
A: Atomic mass refers to a single atom (in atomic mass units), while molar mass refers to one mole of atoms/molecules (in g/mol). Numerically, they're equal when using g/mol units.

Q2: Why are some atomic masses not whole numbers?
A: Atomic masses account for isotopic abundance. For example, chlorine's atomic mass (35.45) reflects the natural abundance of Cl-35 and Cl-37 isotopes.

Q3: How accurate are these calculations?
A: They're accurate for standard stoichiometric calculations. For precise work, use IUPAC's most recent atomic weights and consider isotopic composition.

Q4: Can I calculate molar mass for complex compounds?
A: Yes, as long as you know the molecular formula and all elements are in our database. The calculator supports any number of elements.

Q5: What if my element isn't recognized?
A: Currently, we support common elements. For uncommon elements, please use the full periodic table reference and calculate manually.