Mole Calculator

Convert between moles, mass, particles, and gas volume

Enter any value you know, and the calculator will compute the rest. Supports Avogadro's number, STP gas volume, and more.

Examples

See how to use the Mole Calculator in real scenarios.

Convert Mass to Moles

Convert Mass to Moles

Find the number of moles in 36 grams of water (H2O).

Mass (g): 36 g

Molar Mass (g/mol): 18.02 g/mol

Moles (mol): mol

Particles: particles

Gas Volume (L, STP): L

Concentration (mol/L): mol/L

Solution Volume (L): L

Convert Moles to Particles

Convert Moles to Particles

How many molecules are in 0.5 mol of CO2?

Mass (g): g

Molar Mass (g/mol): 44.01 g/mol

Moles (mol): 0.5 mol

Particles: particles

Gas Volume (L, STP): L

Concentration (mol/L): mol/L

Solution Volume (L): L

Gas Volume to Moles (STP)

Gas Volume to Moles (STP)

How many moles are in 44.8 L of O2 gas at STP?

Mass (g): g

Molar Mass (g/mol): 32 g/mol

Moles (mol): mol

Particles: particles

Gas Volume (L, STP): 44.8 L

Concentration (mol/L): mol/L

Solution Volume (L): L

Moles in Solution

Moles in Solution

How many moles are in 0.5 L of 2.0 M NaCl solution?

Mass (g): g

Molar Mass (g/mol): 58.44 g/mol

Moles (mol): mol

Particles: particles

Gas Volume (L, STP): L

Concentration (mol/L): 2 mol/L

Solution Volume (L): 0.5 L

Other Titles
Understanding the Mole Calculator: A Comprehensive Guide
Master mole, mass, particles, and volume conversions in chemistry.

What is a Mole?

  • Definition of Mole
  • Avogadro's Number
  • Importance in Chemistry
A mole is a fundamental unit in chemistry representing 6.022 x 10^23 particles (atoms, molecules, or ions). It allows chemists to count particles by weighing them.
Avogadro's Number
Avogadro's number (6.022 x 10^23) is the number of particles in one mole of a substance.

Mole Examples

  • 1 mol of H2O contains 6.022 x 10^23 molecules.
  • 1 mol of Na+ contains 6.022 x 10^23 ions.

Step-by-Step Guide to Using the Mole Calculator

  • Input Fields
  • Calculation Process
  • Interpreting Results
Enter any known value (mass, moles, particles, etc.) and the calculator will compute the rest using standard chemistry formulas.
Calculation Logic
The calculator uses relationships such as n = m/M, N = n x Avogadro's number, and V = n x 22.4 (for gases at STP).

Step-by-Step Examples

  • Input 36g H2O and 18.02 g/mol to get 2 mol.
  • Input 0.5 mol CO2 to get 3.01 x 10^23 molecules.

Real-World Applications of the Mole Calculator

  • Laboratory Use
  • Industrial Chemistry
  • Education
The Mole Calculator is essential for preparing solutions, stoichiometry, and chemical reactions in labs and industry.
Educational Value
Students use the calculator to understand the relationships between mass, moles, and particles.

Application Examples

  • Preparing 1L of 1M NaCl solution.
  • Calculating moles of O2 needed for combustion.

Common Misconceptions and Correct Methods

  • Confusing Units
  • Incorrect Formula Use
  • Significant Figures
Always use correct units and formulas. Double-check molar mass and conversion factors.
Significant Figures
Report answers with the correct number of significant figures based on input data.

Misconception Examples

  • Don't use 24L for STP gas volume; use 22.4L.
  • Check if you need atoms, molecules, or ions.

Mathematical Derivation and Examples

  • Mole-Mass Conversion
  • Mole-Particles Conversion
  • Mole-Gas Volume Conversion
n = m / M, N = n x Avogadro's number, V = n x 22.4 (STP).
Worked Examples
Example: 36g H2O / 18.02 g/mol = 2 mol. 0.5 mol CO2 x 6.022e23 = 3.01e23 molecules.

Mathematical Examples

  • 36g H2O to moles: 2 mol.
  • 0.5 mol CO2 to molecules: 3.01e23.