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Chemistry Constants (Quick Reference)

One-tap copy of the constants you use every day. Toggle LaTeX copy and units where helpful.

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Fundamentals

Avogadro’s number (N_A)

Elementary charge (e)

Atomic mass unit (1 u)

Speed of light (c)

Planck’s constant (h)

Boltzmann constant (k_B)

Chemistry favorites

Gas constant (R = N_A·k_B)

Faraday’s constant (F = N_A·e)

More gas constants (common units)

R in L·atm·mol⁻¹·K⁻¹

R in L·Torr·mol⁻¹·K⁻¹ (mmHg)

R in L·bar·mol⁻¹·K⁻¹

Notes

Exact by SI definition: N_A, e, c, h, and k_B. Identities like F = N_A·e and R = N_A·k_B follow directly; we display numeric values to standard precision.
The atomic mass unit (1 u) in g or kg follows CODATA recommended values.
Atmosphere conversions are exact: 1 atm = 101,325 Pa = 101.325 kPa.

1. Intro to General Chemistry

Metric Prefixes

1. Intro to General Chemistry

Scientific Notation

1. Intro to General Chemistry

Conversion Factors

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Dimensional Analysis

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Significant Figures

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2. Atoms & Elements

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Law of Conservation of Mass

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The Ideal Gas Law

The Ideal Gas Law Derivations

The Ideal Gas Law Applications

First Law of Thermodynamics -

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Enthalpy of Formation

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9. Quantum Mechanics

Photoelectric Effect

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19. Chemical Thermodynamics

Gibbs Free Energy

19. Chemical Thermodynamics

Gibbs Free Energy & Equilibrium

19. Chemical Thermodynamics

Cell Potential and Gibbs Free Energy

20. Electrochemistry

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1. Intro to General Chemistry - Part 2 of 3

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2. Atoms & Elements - Part 2 of 4

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