A metal alloy of unknown composition was bombarded with 204 nm photons to determine its photoelectric properties. Electrons photo-ejected from this alloy had a velocity of 6.70 × 105 m/ s. What is the work function, O, of this alloy in eV? (1 eV = 1.60 × 10-19 J, the mass of an electron is 9.109 x 10-31 kg, and Planck's constant is 6.626 x 10-34 Js.) %3D

A metal alloy of unknown composition was bombarded with 204 nm photons to determine its photoelectric properties. Electrons photo-ejected from this alloy had a velocity of 6.70 × 105 m/ s. What is the work function, O, of this alloy in eV? (1 eV = 1.60 × 10-19 J, the mass of an electron is 9.109 x 10-31 kg, and Planck's constant is 6.626 x 10-34 Js.) %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

When a metal was exposed to photons at a frequency of 1.31 x 105 s-', electrons were emitted with a maximum kinetic energy of 3.80 × 10-19 J. Calculate the work function, D, of this metal. J/photon What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 8.97 × 10-7 J? number of electrons:
In Einstein's photoelectric experiment, the kinetic energy of an electron displaced from a metal by a photon was the difference between the energy of a photon and a threshold energy value for the metal. If you were to perform a similar experiment with cobalt, which has a threshold energy of 8.01 × 10⁻¹⁹ J, and ultraviolet light of wavelength 29.5 nm, what would be the kinetic energy (in J) of the electron displaced?
A laser pointer used in the classroom emits light at 4950 Å, at a power of 4.00 mW. (One watt is the SI unit of power, the measure of energy per unit of time. 1 W = 1 J/s). How many photons are emitted from the pointer in 115 seconds?
Silver has a work function, Φ, of 4.64 eV. If a sample of silver is bombarded with 213 nm photons, what will be the wavelength (in meters) of the photo-ejected electrons? (1 eV = 1.60 × 10⁻¹⁹ J, the mass of an electron is 9.109 x 10⁻³¹ kg, and Planck's constant is 6.626 x 10⁻³⁴ Js.)
A Li2+ ion absorbs a photon with a frequency of 6.66 x 10^14 Hz. If the energy of the final state of Li2+ was -7.85 x 10^19 J, calculate the energy of the initial state.
Payalben
Visible light falls into wavelength ranges of 400-700 nm, for which 1 m = 1 × 10° nm The energy and wavelength of light are related by the equation hc E = where E is energy in Joules, h is Planck's constant (6.626 x 10 34 J-s), c is the speed of light (2.998 x 10° m/s), and X is the wavelength in m. If a visible light photon has a wavelength of 447.3 nm, what is the energy of the photon (in J)? Type answer:
Calculate the wavelength(nm) of light that strikes a metal with a threshold frequency of 2.84 x 1014s-1 and ejects an electron with a kinetic energy of 5.48 x 10-19J.
What is the energy (in J) of a photon with a frequency of 7.23 × 10¹⁴ s⁻¹? (h = 6.626 × 10⁻³⁴ J • s)
Pieces of potassium (Φ = 3.68 ×× 10–19 J) and sodium (Φ = 4.41 ×× 10–19 J) metal are exposed to radiation of wavelength 350.0 nm. What is the velocity of the electrons from sodium?
Calculate the frequency of electromagnetic radiation emitted by the hydrogen atom in the electron transition from n = 4 to n = 1. The Rydberg constant has the value of 2.179 x 10-18 J. (Enter your answer to four significant figures.) Frequency = /s
Assuming that radiation with λ=15.0λ=15.0 cmcm is used, that all the energy is converted to heat, and that 4.184 JJ is needed to raise the temperature of 1.00 gg of water by 1.00 ∘C∘C, how many photons are necessary to raise the temperature of a 250 mLmL cup of water from 25 ∘C∘C to 95 ∘C∘C?