Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a chemical formula.

Key Concepts:

• Mole: Unit of measurement for amount of substance (6.022 × 10²³ particles)
• Atomic Mass: Mass of a single atom, measured in atomic mass units (amu)
• Molar Mass: Mass of one mole of a substance in grams
• Molecular Weight: Sum of atomic weights in a molecule

Common Atomic Masses:

• Hydrogen (H): 1.008 g/mol
• Carbon (C): 12.011 g/mol
• Nitrogen (N): 14.007 g/mol
• Oxygen (O): 15.999 g/mol
• Sodium (Na): 22.990 g/mol
• Chlorine (Cl): 35.453 g/mol

Applications:

• Stoichiometry calculations
• Solution concentration preparation
• Chemical reaction balancing
• Laboratory measurements
• Industrial chemical processes