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 formula:

Where:

• Atomic Mass — Standard atomic weight of each element (g/mol)
• Number of Atoms — Count of each element in the formula

Explanation: The calculator sums the products of each element's atomic mass multiplied by its count in the formula.

3. Importance of Molar Mass Calculation

Details: Molar mass is essential for converting between grams and moles, preparing solutions, stoichiometric calculations, and determining empirical/molecular formulas.

4. Using the Calculator

Tips: Enter the chemical formula (e.g., H2O for water, C6H12O6 for glucose). Use proper capitalization (Na for sodium, not NA). Subscripts should follow element symbols directly.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between molar mass and molecular weight?
A: They are numerically the same but molar mass has units of g/mol while molecular weight is dimensionless.

Q2: How do I calculate molar mass for hydrates?
A: Include the water molecules in the formula (e.g., CuSO4·5H2O).

Q3: What about formulas with parentheses?
A: This calculator handles simple formulas. For complex ones like (NH4)2SO4, use a more advanced tool.

Q4: Where do the atomic masses come from?
A: From IUPAC standard atomic weights, which account for natural isotope abundance.

Q5: Why is my calculated value slightly different from published values?
A: Published values may use more precise atomic weights or account for specific isotope compositions.