Chemistry Tools
Free, interactive chemistry tools for students and educators. Calculate molar masses, visualize Lewis structures, and predict molecular geometries using VSEPR theory.
⚖️ Molar Mass Calculator
Calculate the molar mass of any chemical compound instantly. Supports complex formulas with parentheses and hydrated compounds.
- Supports all elements from the periodic table
- Handles complex formulas like H₂SO₄ and C₆H₁₂O₆
- Provides step‑by‑step calculation breakdown
- Accurate to 3 decimal places
🔬 Lewis Structure Visualizer
Generate Lewis dot structures for any molecule using a rule‑based algorithm. Visualizes valence electrons, bonds, and formal charges.
- Automatic valence electron counting
- Octet rule verification
- Formal charge calculation
- SVG rendering of the structure
📐 Molecular Geometry Predictor
Predict molecular geometry using VSEPR theory. Adjust bonding pairs and lone pairs interactively and see the predicted shape.
- Interactive controls for electron groups
- Visual geometry previews
- Bond angle information
- Covers all common geometries from linear to octahedral
Why Use Our Chemistry Tools?
Our chemistry tools are designed to help students understand fundamental concepts in general chemistry. The molar mass calculator provides accurate mass calculations for any compound using up‑to‑date atomic masses. The Lewis structure visualizer implements a rule‑based algorithm that distributes valence electrons, checks the octet rule, and calculates formal charges. The molecular geometry predictor uses VSEPR theory to determine the shape of molecules based on electron group repulsion — a core concept in introductory chemistry courses.