1. What is Molar Mass?

Molar mass is the mass of one mole of a substance (chemical element or chemical compound) measured in grams per mole (g/mol). It is calculated as the sum of the atomic masses of all atoms in the chemical formula.

2. How is Molar Mass Calculated?

The calculator uses the formula:

Where:

• \( MW \) — Molar mass (g/mol)
• \( \text{atomic mass} \) — Standard atomic weight of each element
• \( \text{count} \) — Number of atoms of each element in the formula

Example: For H₂O: (1.008 × 2) + 15.999 = 18.015 g/mol

3. Importance of Molar Mass

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

4. Using the Calculator

Tips: Enter the chemical formula using standard notation (e.g., H2O, C6H12O6, NaCl). The calculator recognizes element symbols and subscripts.

5. Frequently Asked Questions (FAQ)

Q1: What if my formula contains parentheses?
A: This calculator handles simple formulas without nested parentheses. For complex formulas, consider using more advanced tools.

Q2: How accurate are the atomic masses?
A: We use standard atomic weights (IUPAC values) rounded to 3-4 decimal places. For precise work, use exact isotopic masses.

Q3: What about hydrates (e.g., CuSO4·5H2O)?
A: Enter as CuSO45H2O (without the dot) for approximate calculation.

Q4: Why is my formula not recognized?
A: Check element symbols (case matters) and ensure all elements are in our database (common elements up to atomic number 30).

Q5: Can I calculate formula weight for ionic compounds?
A: Yes, formula weight and molar mass are calculated the same way for all compounds.