What is the frequency of light that has an energy of 1.8 x 10-15 j? 6.626 x 10-34 js 2.7 x 1018 hz 3.7 x 10-19 hz 1.2 x 10-48 hz

In order to determine the frequency, we may use Planck's equation:

Energy = Planck's constant * frequency

Rearranging and substituting the values,

frequency = (1.8 x 10⁻¹⁵) / (6.63 x 10⁻³⁴)
f = 2.71 x 10¹⁸ Hz

The frequency of the light is 2.7 x 10¹⁸ Hz

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.