USNCO Exams Reference Page
Below is the standard information provided for reference in all USNCO exams. No additional information may be accessed while taking any USNCO exam.
Abbreviations and Symbols
Full Name | Abbreviation/ Symbol |
---|---|
Amount Of Substance | N |
Ampere | A |
Atmosphere | Atm |
Atomic Mass Unit | U |
Avogadro Constant | NA |
Celsius Temperature | °C |
Centi– Prefix | C |
Coulomb | C |
Density | D |
Electromotive Force | E |
Energy Of Activation | Ea |
Enthalpy | H |
Entropy | S |
Equilibrium Constant | K |
Faraday Constant | F |
Free Energy | G |
Frequency | Ν |
Gas Constant | R |
Gram | G |
Hour | H |
Joule | J |
Kelvin | K |
Kilo– Prefix | K |
Liter | L |
Measure Of Pressure | Mm Hg |
Milli– Prefix | M |
Molal | M |
Molar | M |
Molar Mass | M |
Mole | Mol |
Planck’s Constant | H |
Pressure | P |
Rate Constant | K |
Reaction Quotient | Q |
Second | S |
Speed Of Light | C |
Temperature, K | T |
Time | T |
Vapor Pressure | VP |
Volt | V |
Volume | V |
Year | Y |
Constants
R = 8.314 J mol–1 K–1
R = 0.08314 L bar mol–1 K–1
F = 96,500 C mol–1
F = 96,500 J V–1 mol–1
NA = 6.022 x 1023 mol–1
h = 6.626 x 10–34 J s
c = 2.998 x 108 m s–1
0 °C = 273.15 K
1 atm = 1.013 bar = 760 mm Hg
Specific heat capacity of H2O = 4.184 J g–1 K–1
Equations
E = Eo — (RT/nF) x lnQ
lnK = (—ΔHo/R) x (1/T) + constant
ln(k2/k1) = (Ea/R) x ((1/T1) — (1/T2))
Thank you to the Olympiad Examinations Task Force and the Olympiad Laboratory Practical Task Force. View all acknowledgements.