Molar mass with steps — compute molar mass and use in stoichiometry

Step-by-step examples: compute molar mass of compounds, convert grams to moles, and apply stoichiometry.

Tool

Use the main Molar Mass Calculator for interactive calculations: Open molar-mass calculator.

Examples

  1. Compute molar mass of H2O
    1. H: 1.008*2 = 2.016; O:16.00 → total = 18.016 g/mol
  2. Grams → moles
    Problem: 36 g of H2O → moles = 36 / 18.016 = 1.998 ≈ 2.0 mol
  3. Use in stoichiometry
    Problem: Given moles of reactant, use balanced equation to find product mass via molar masses.