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Question 3. d) determine the longest wavelength of radiation  e) moles of photons are contained in a flash

Question 3. d) determine the longest wavelength of radiation  e) moles of photons are contained in a flash

Chemistry
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...
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Question 3.

d) determine the longest wavelength of radiation 

e) moles of photons are contained in a flash 

 

if the electron begins in the n = 2 level. %3D Bar-code scanners at supermarkets emit orange-red laser light with a wavelength of 633 nm. If the energy output of these scanners is 1.0 mJ per second, how many photons are release if the scanner operates for 2.0 seconds? d. Determine the longest wavelength of radiation required to ionize a sample of potassium meta if the binding energy for the electron is 1760 kJ/mol. e. How many moles of photons are contained in a flash of 607 x 1012 Hz radiation that contains 20.21 kJ of energy? f. It is reported that the threshold frequency for zinc is 1.038 x 1015 s-1. Calculate the speed o emitted photoelectrons, as well as their maximum kinetic energy (in J and eV), when 195 nr radiation strikes a piece of polished zinc. g. A number of compounds can be formed by combining atoms of nitrogen and oxygen. In ou “virtual chemistry laboratory" you are told that one compound contains 30.45 % nitrogen by mass, while in a second compound it is only 25.94 % nitrogen by mass. Show that this dat consistent with the Law of Multiple Proportions. 5(D) - 5 C.
Transcribed Image Text:if the electron begins in the n = 2 level. %3D Bar-code scanners at supermarkets emit orange-red laser light with a wavelength of 633 nm. If the energy output of these scanners is 1.0 mJ per second, how many photons are release if the scanner operates for 2.0 seconds? d. Determine the longest wavelength of radiation required to ionize a sample of potassium meta if the binding energy for the electron is 1760 kJ/mol. e. How many moles of photons are contained in a flash of 607 x 1012 Hz radiation that contains 20.21 kJ of energy? f. It is reported that the threshold frequency for zinc is 1.038 x 1015 s-1. Calculate the speed o emitted photoelectrons, as well as their maximum kinetic energy (in J and eV), when 195 nr radiation strikes a piece of polished zinc. g. A number of compounds can be formed by combining atoms of nitrogen and oxygen. In ou “virtual chemistry laboratory" you are told that one compound contains 30.45 % nitrogen by mass, while in a second compound it is only 25.94 % nitrogen by mass. Show that this dat consistent with the Law of Multiple Proportions. 5(D) - 5 C.
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