Helpful Constants
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Energy Conversion | kJ mol-1 | kcal mol-1 | eV | cm-1 |
kJ mol-1 | 1 | 0.23901 | 1.0364×10-2 | 83.59 |
kcal mol-1 | 4.184 | 1 | 4.3363×10-2 | 349.75 |
eV | 96.485 | 23.061 | 1 | 8065.5 |
cm-1 | 1.1963×10-2 | 2.8591×10-3 | 1.2398×10-4 | 1 |

wavenumber wavelength and frequency chart
Universal Constant | Units and Value |
h (Planck’s constant) | 6.626075 *10-34 J s |
kB (Boltzman’s constant) | 1.38065 *10-23 J K-1 |
NA (Avogadro’s number) | 6.022136 *1023 mol-1 |
c (speed of light) | 2.9979245 *108 m s-1 |
ao (Bohr radius) | 5.2917724 *10-11 m |
e (charge of an electron) | 1.6021773 *10-19 Coulomb |