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 moles.

2. How is Molar Mass Calculated?

The molar mass is calculated by summing the atomic masses of all atoms in the chemical formula:

Where:

• \( MM \) — Molar mass (g/mol)
• Each element's contribution is its atomic weight multiplied by its subscript in the formula

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

3. Importance of Molar Mass

Details: Molar mass is essential for converting between grams and moles, preparing solutions with specific concentrations, and stoichiometric calculations in chemical reactions.

4. Using the Calculator

Tips: Enter the chemical formula using standard notation (e.g., H2O, C6H12O6, NaCl). The calculator will sum the atomic masses of all elements in the formula.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between molecular mass and molar mass?
A: Molecular mass is the mass of one molecule (in atomic mass units), while molar mass is the mass of one mole of molecules (in grams per mole).

Q2: How accurate are these calculations?
A: The accuracy depends on the precision of the atomic weights used. We use IUPAC recommended atomic weights.

Q3: Does the calculator work for complex formulas?
A: Yes, it can handle hydrates, salts, and organic compounds as long as they're entered with proper syntax.

Q4: What about isotopes?
A: The calculator uses average atomic masses that account for natural isotopic abundance.

Q5: Can I use parentheses in formulas?
A: Yes, formulas like Ca(OH)2 are supported, with proper calculation of groups in parentheses.