Semiconductors, such as silicon, are the heart of the circuits that form the basis for computers and other electronics. These materials are characterized by a gap in the energy, known as the band gap, between a filled valence band and an empty conduction band. a). How much dopant is present in 191 kg of semiconductor with a dopant concentration of 2.00 ppm by mass? Express your answer numerically in grams. b). Because of its semiconducting properties, CdS is sometimes used in electronic devices. The band gap energy for CdS is 2.40 eV . What is wavelength of a photon with this energy? Express your answer numerically in nanometers. c). Given that an atom of a semiconductor has a diameter of 2.75 Å , what is the maximum number of moles that fit in the channel of a processor chip that is 76.6 nm long, 72.9 nm , wide and 515 nm thick? Assume that the atoms stack in a simple cubic arrangement. Express your answer numerically in moles.
Semiconductors, such as silicon, are the heart of the circuits that form the basis for computers and other electronics. These materials are characterized by a gap in the energy, known as the band gap, between a filled valence band and an empty conduction band. a). How much dopant is present in 191 kg of semiconductor with a dopant concentration of 2.00 ppm by mass? Express your answer numerically in grams. b). Because of its semiconducting properties, CdS is sometimes used in electronic devices. The band gap energy for CdS is 2.40 eV . What is wavelength of a photon with this energy? Express your answer numerically in nanometers. c). Given that an atom of a semiconductor has a diameter of 2.75 Å , what is the maximum number of moles that fit in the channel of a processor chip that is 76.6 nm long, 72.9 nm , wide and 515 nm thick? Assume that the atoms stack in a simple cubic arrangement. Express your answer numerically in moles.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter11: Solutions
Section: Chapter Questions
Problem 16P
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Semiconductors, such as silicon, are the heart of the circuits that form the basis for computers and other electronics. These materials are characterized by a gap in the energy, known as the band gap, between a filled valence band and an empty conduction band.
a). How much dopant is present in 191 kg of semiconductor with a dopant concentration of 2.00 ppm by mass?
Express your answer numerically in grams.
b). Because of its semiconducting properties, CdS is sometimes used in electronic devices. The band gap energy for CdS is 2.40 eV . What is wavelength of a photon with this energy?
Express your answer numerically in nanometers.
c). Given that an atom of a semiconductor has a diameter of 2.75 Å , what is the maximum number of moles that fit in the channel of a processor chip that is 76.6 nm long, 72.9 nm , wide and 515 nm thick? Assume that the atoms stack in a simple cubic arrangement.
Express your answer numerically in moles.
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