On this page
Understanding the Mole in Chemistry
Formula
The mole is the SI unit for amount of substance, defined as exactly 6.02214076 x 10²³ elementary entities. It bridges the gap between the atomic scale and the macroscopic scale, allowing chemists to count atoms and molecules by weighing them.
To convert between mass and moles, divide the mass (in grams) by the molar mass (in g/mol). Multiplying moles by Avogadro's number gives the number of individual atoms, molecules, or formula units.
Common use cases:
- Stoichiometry calculations
- Lab preparation of reagents
- Converting mass to particle count
Frequently Asked Questions
Was this calculator helpful?
People Also Use
pH Calculator
Calculate pH, pOH, and hydrogen ion concentration from any given value using logarithmic acid-base formulas.
Molarity Calculator
Calculate molarity (molar concentration) from solute mass, molar mass, and solution volume with this free chemistry tool.
Dilution Calculator
Calculate dilution volumes and concentrations using the C1V1 = C2V2 equation for laboratory solution preparation.
Ideal Gas Law
Solve the ideal gas law equation PV = nRT for pressure, volume, temperature, or moles with unit conversions.
Molecular Weight
Calculate the molecular weight and elemental composition of any chemical compound from its formula.
Solution Concentration
Calculate solution concentration in mass percent, ppm, and molality from solute and solvent amounts.
Boiling Point Elevation
Calculate the boiling point elevation of a solution using the ebullioscopic constant, molality, and van't Hoff factor.
Freezing Point Depression
Calculate freezing point depression using the cryoscopic constant, molality, and van't Hoff factor.