SI Units

1 meter = distance light travels in 1/299792458 second

$1ml=1cm^{2}$

1 kg = 1.000025 liters water

1 mole = 6.022e23 atoms

E = hv

λν = c

c = speed of light 299792458 (m/s) E = energy of photon v = frequency h = Planck constant = 6.62606e−34 (J•s) or (m^2•kg)/s λ = wavelength J = joule e = charge = 1.60217e−19 (C) or (s•A) C = coulomb = k = boltzmann = 1.38065e−23 (J/K) or (m^2•kg•s^−2)/K K = kelvin NA = Avogadro# = 6.02214e23 (mol−1).