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Chapter 31 Appendix G: Physical Constants and Conversion Factors
|Selected Physical Constants|
|Atomic mass unit||1 amu = 1.6605389 × 10−24 g|
|1 g = 6.022142 × 1023 amu|
|Avogadro’s number||N = 6.022142 × 1023/mol|
|Boltzmann’s constant||k = 1.380651 × 10−23 J/K|
|Charge on electron||e = 1.6021765 × 10−19 C|
|Faraday’s constant||F = 9.6485338 × 104 C/mol|
|Gas constant||R = 0.0820575 (L atm)/(mol K)|
|= 8.31447 J/(mol K)|
|Mass of electron||me = 5.485799 × 10−4 amu|
|= 9.109383 × 10−28 g|
|Mass of neutron||mn = 1.0086649 amu|
|= 1.6749273 × 10−24 g|
|Mass of proton||mp = 1.0072765 amu|
|= 1.6726217 × 10−24 g|
|Pi||π = 3.1415927|
|Planck’s constant||h = 6.626069 × 10 −34J s|
|Speed of light (in vacuum)||c = 2.99792458 × 108 m/s (exact)|
|Useful Conversion Factors and Relationships|
|Si unit: meter (m)||Si unit: joule (J)|
|SI unit: kilogram (kg)||SI unit: pascal (Pa)|
|Si unit: kelvin (K)||SI unit: cubic meter (m 3 )|