chem help

posted by .

the primary visible emissions from mercury are 404.7 nm and 435.8 nm. Calculate the frequencies for these emissions. Calculate the energy of a single photon and of a mole of photons of light with each of these wavelengths.

  • chem help -

    c = frequency*wavelength
    404.7 and 435.8 are wavelenths in nm. Convert those to m.
    E = hc/wavelength for one photon.
    That x 6.022E23 for a mole of photons.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Quantum Physics

    How is it a substance can emit photons of visible light after absorbing ultra violet photons but not with infrared radiation The re-emitted photons must be of lessor energy (longer wavelength) than the incident photons. In a one-photon …
  2. chem

    A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV photon having a wavelength of 24 nm?
  3. Physics

    A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per second …
  4. Physics

    In the process of fluorescence, an atom ab- sorbs a photon of ultraviolet light and emits two or more photons of visible light. Is the reverse process possible?
  5. physics

    A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per second …
  6. physics

    If a 80 lightbulb emits 4.0 of the input energy as visible light (average wavelength 550 ) uniformly in all directions, estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer …
  7. Chemistry

    "The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth …
  8. chemistry

    "The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth …
  9. Physical Science

    A transparent object made of glass without any color (A) absorbs all frequencies of visible light and re-emits them from atom to atom through the object. (B) absorbs all frequencies of visible light and transforms the energy into thermal …
  10. college algebra

    Are total emissions or per-capita emissions a better gauge when comparing the CO2 emissions of various countries?

More Similar Questions