Three Powerful Calculation Modes
- Molecular Weight from Formula: Enter any chemical formula (H₂O, C₆H₁₂O₆, NaCl, etc.) to instantly get its molar mass in g/mol with element breakdown.
- Moles from Mass: Given the mass of a substance and its molecular weight, calculate how many moles it contains. Essential for stoichiometry.
- Mass from Moles: Given the number of moles and molecular weight, calculate the exact mass needed.
Input Guidance & Tips
- Capitalization matters: Use Na for Sodium, O for Oxygen. Lowercase letters are for second letters in element symbols (e.g. He, Cl).
- Numbers: Numbers after an element indicate how many atoms of that element are present (H2O = two hydrogen atoms).
- Examples to try: H2O, CO2, NaCl, C6H12O6 (glucose), (NH4)2SO4 (ammonium sulfate), CH3COOH (acetic acid).
- Parentheses: This version supports basic formulas. For complex ones with parentheses, results are approximate.
Key Formula
Molecular Weight = Σ (Atomic Weight × Number of Atoms of each element)