Equations Topic 2/12

Question 1

Relative average mass equation

Answer 1

∑m(ln) * n(ln) / ntot

where
m(ln) = mass of isotope n
n(ln) = particles of isotope n
ntot = total particles

Question 2

Photon energy equation

Answer 2

Ephoton = hv => Ephoton = hc / lambda

where
Ephoton = photon energy
h = Planck’s constant
v = frequency of EM wave
c = speed of light
lambda = wavelength of EM wave