Frequency of violet light, the energy of one photon of violet light and the energy of 1 mol of violet protons?

PLEASE HELP with the question below!:





Violet light has a wavelength of about 410 nm. What is its frequency? Calculate the energy of one photon of violet light. What is the energy of 1.0 mol of violet photons? Compare the energy of photons of violet light with those of red light. Which is more energetic?

Frequency of violet light, the energy of one photon of violet light and the energy of 1 mol of violet protons?
for the frequency, the equation to use is c = λν


c = 3.00e8 m/s


λ = 410 nm = 410e-9 m = 4.10e-7 m


3.00e8 m/s = (4.10e-7m)ν


ν = 7.32e14/s





for the energy of one photon


E = hν


h = 6.626e-34 J•s


E = (6.626e-34 J•s)(7.32e14/s)


E=4.85e-19 J





for a mol of photons


(4.85e-19 J/photon)(6.02e23 photons/mol) = 2.92e5 J/mol





red light has a wavelength of ~700 nm, do the calculations the same way