The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the efficiency of the process. The quantum yield, d, is defined 4, as: number of reaction events number of photons absorbed Suppose the quantum yield for the reaction CH;X - CH3 + X is =0.24. A cuvette con- taining a solution of CH3X is irradiated with 280-nm light with a power of 885 mW for 10.0 minutes. Assuming total absorp- tion of the light by the sample, what is the maximum amount (in moles) of CH3X that breaks apart?

One of the radiographic devices used in a dentist's office emits an X-ray of wavelength 2.109 ✕ 10−11 m. What is the energy, in joules, and frequency, in hertz, of this X-ray?

An electron moves in a two-dimensional rectangular box with the dimensions, Lx= 5.00 Å and Ly =3.00 Å. Calculate the energy of the absorbed photon in cm"l when it makes a transition from the ground state to the 1st excited state.

What is the de Broglie wavelength of an oxygen molecule, O_(2), traveling at 521(m)/(s) ? Is the wavelength much smaller or much larger than the diameter of an atom (on the order of 100pm)?

A laser pulse at 500. nm contains 4.95 mJ of energy. How many photons are in the laser pulse? 1.25 x 1016 8.04 x 10-17 3.98 x 10-19 1.25 x 1019

how many photons are there in a 7.00 mJ laser beam of wavelength 785 nm?

Calculate the energy of a mole (einstein) of photons with wavelength 485.4 nm.

58. It has been suggested that spacecraft could be powered by the pressure exerted by sunlight striking a sail. The force exerted on a surface is the momentum p transferred to the surface per second. Assume that photons of 6000 Å light strike the sail perpendicularly. How many must be reflected per second by 1 cm² of surface to produce a pressure of 10-6 atm?

A 100. W lamp emits red light of wavelength 680 nm. How many photons can the lamp generate in 26 seconds? (1W = 1J/s) Provide your answer in E- notation rounded to 2 significant figures.

How many kilojoules of energy are contained in one mole of violet light photons of frequency 7.00 x 10^14 s -1 ?