Mole Converter & Gas Stoichiometry

Enter a chemical formula and a quantity in grams, moles, molecules, or liters at STP. The tool converts to all other units and shows the step-by-step dimensional analysis.

Input

Chemical Formula

Quantity

Unit

Presets

Results

Molar Mass

18.015 g/mol

Grams

18 g

Moles

0.999167 mol

Molecules

6.0171 x 10^23

Liters at STP

22.3953 L

Mole Map

Step-by-Step Dimensional Analysis

1. Determine molar mass

M(\text{H2O}) = 18.015 \text{ g/mol}

2. Convert grams to moles

n = \frac{m}{M} = \frac{18}{18.015} = 0.999167 \text{ mol}

3. Calculate molecules

N = n \times N_A = 0.999167 \times 6.022 \times 10^{23} = 6.0171 \times 10^{23}

4. Calculate volume at STP

V = n \times 22.414 = 0.999167 \times 22.414 = 22.3953 \text{ L}

Reference Guide

Molar Mass

The molar mass (M) is the mass of one mole of a substance, equal to the sum of atomic masses of all atoms in the formula.

n = \frac{m}{M}

Avogadro's Number

One mole contains exactly 6.022 x 10^23 particles (atoms, molecules, or formula units).

N = n \times N_A = n \times 6.022 \times 10^{23}

Molar Volume at STP

At standard temperature and pressure (0 C, 1 atm), one mole of any ideal gas occupies 22.4 liters.

V = n \times 22.414 \text{ L/mol}

Dimensional Analysis

Convert between units by multiplying by conversion factors so that unwanted units cancel. The mole sits at the center of all conversions.

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Mole Converter & Gas Stoichiometry

Input

Results

Mole Map

Step-by-Step Dimensional Analysis

Reference Guide

Molar Mass

Avogadro's Number

Molar Volume at STP

Dimensional Analysis

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