Concept explainers
(a)
Interpretation:
The
Concept Introduction:
The wave nature of any light can be described by its frequency, wavelength, and amplitude. The wavelength
The relation between frequency
Here,
The relation between the energy
Here,
(a)
Answer to Problem 7.30QE
The wavelength of light is
Explanation of Solution
Rearrange equation (1) to calculate
Substitute
(b)
Interpretation:
The energy of one photon for light of frequency
Concept Introduction:
Refer to part (a).
(b)
Answer to Problem 7.30QE
The energy of one photon for light is
Explanation of Solution
Substitute
(c)
Interpretation:
The energy of one mole photon in
Concept Introduction:
Refer to part (a).
(c)
Answer to Problem 7.30QE
The energy of one mole photon for light is
Explanation of Solution
Substitute
The energy per phone is
The expression to calculate the energy of 1 mole photon is as follows:
Here,
Substitute
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Chapter 7 Solutions
Chemistry: Principles and Practice
- A particular microwave oven delivers 750 watts. (A watt is a unit of power, which is the joules of energy delivered, or used, per second.) If the oven uses microwave radiation of wavelength 12.6 cm, how many photons of this radiation are required to heat 1.00 g of water 1.00C, assuming that all of the photons are absorbed?arrow_forward6.17 The laser in most supermarket barcode scanners operates at a wavelength of 632.8 nm. What is the energy of a single photon emitted by such a laser? What is the energy of one mole of these photons?arrow_forwardA photoemissive material has a threshold energy, Emin = 5 1019 J. Will 300. nm radiation eject electrons from the material? Explain.arrow_forward
- A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy, in joules, must be released by an electron in a mercury atom to produce a photon of this light?arrow_forwardAn FM radio station broadcasts at a frequency of 101.3 MHz. What is the wavelength, in meters and nanometers, of this radiation?arrow_forwardLight with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.36 105 m/s, what energy was expended in removing the electron from the metal? Express the answer in joules (per electron) and in kilojoules per mole (of electrons).arrow_forward
- A hydrogen atom in the ground stale absorbs a photon whose wavelength is 95.0 nm. The resulting excited atom then emits a photon of 1282 nm. What are the regions of the electromagnetic spectrum for the radiations involved in these transitions? What is the principal quantum number of the final state resulting from the emission from the excited atom?arrow_forward6.86 An excited He+ ion returns to the ground state by emitting a series of three photons, with wavelengths of 26 nm, 469 nm, and 1014 nm. The process is represented in the energy level diagram below. Which arrow (A, B, or C) in the diagram represents the 1014-nm light?arrow_forward
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