1. What is Molar Mass?

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). For compounds, it is the sum of the atomic masses of all atoms in the molecule.

2. How to Calculate Molar Mass of NaCl

The molar mass of sodium chloride (NaCl) is calculated using the formula:

Where:

• \( M_{Na} \) — Atomic mass of sodium (22.99 g/mol)
• \( M_{Cl} \) — Atomic mass of chlorine (35.45 g/mol)

Calculation: M = 22.99 + 35.45 = 58.44 g/mol

3. Importance of Molar Mass Calculation

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

4. Using the Calculator

Tips: Enter the atomic masses of sodium and chlorine in g/mol. The calculator will automatically compute the molar mass of NaCl. You can use standard values (Na: 22.99, Cl: 35.45) or custom values for educational purposes.

5. Frequently Asked Questions (FAQ)

Q1: Why is the molar mass of NaCl 58.44 g/mol?
A: This value comes from the sum of sodium's atomic mass (22.99 g/mol) and chlorine's atomic mass (35.45 g/mol).

Q2: Can molar mass vary for different samples of NaCl?
A: No, the molar mass is constant for pure NaCl as it depends only on the atomic masses of its constituent elements.

Q3: How is molar mass used in laboratory work?
A: It is used to prepare solutions of specific molarity, calculate yields in chemical reactions, and determine molecular formulas.

Q4: What's the difference between molecular mass and molar mass?
A: Molecular mass is the mass of one molecule in atomic mass units (amu), while molar mass is the mass of one mole of substance in grams per mole.

Q5: Why are atomic masses not whole numbers?
A: Atomic masses are weighted averages of naturally occurring isotopes, accounting for their relative abundances.