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Common Constants in Chemistry

Identifier Value Units Description
uc_AlphaPartMass 6.6446559810-27 kg alpha particle mass (helion nucleus)
uc_AlphaPartMassEnergyJ 5.9719189710-10 J alpha particle mass energy equivalent (in Joule)
uc_AlphaPartMassEnergyMeV 3727.37904 MeV alpha particle mass energy equivalent (in MeV)
uc_Avogadro 6.022141991023 mol-1 Avogadro's number NA (or L): number of particles in one mol of substance
uc_BohrRadius 5.29177208310-11 m Bohr radius
uc_MolarGas 8.314472 J mol-1 K-1 molar gas constant
uc_StandardGasVolume 2.271098110-1 m3 mol-1 standard gas volume

Last Update: 2012-Okt-20