Posted by **mary** on Thursday, October 21, 2010 at 12:57pm.

What is the frequency of a photon with an energy of 7.40 10-18 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

- (physics/chemistry) -
**drwls **, Thursday, October 21, 2010 at 1:47pm
You may have got this question in a chem glass, but it is really about physics.

E = h*frequency is the equation to use

h is Planck's constant, which you were given.

Solve for the frequency, in s^-1 (also called Hz)

You don't need to use the speed of light to answer this question. You would need that for the wavelength.

## Answer this Question

## Related Questions

- chemistry - What is the frequency of a photon with a wavelength of 5.60 10-7 m...
- chemistry - What is the wavelength of a photon with an energy of 6.35 10-19 J? (...
- chemistry - What is the energy of a photon with a wavelength of 4.55 10-6 m? (...
- Beginning Chem. - A. What is the frequency of a photon with a wavelength of 8....
- chemistry - What is the energy of a photon with a wavelength of 8.45 102 nm? (...
- chemistry - What is the energy of a photon with a wavelength of 1.45 103 nm? (...
- 10th grade - What is the frequency of a photon with a wavelength of 2.50 102 nm...
- Chemistry - What is the wavelength in nanometers of a photon with a frequency of...
- physics - Calculate the change in energy of an atom that emits a photon of ...
- Chemistry - An atom emits a photon of wavelength 1.08 meters. What is the energy...

More Related Questions