Chemistry In Focus
7th Edition
ISBN: 9781337670425
Author: Tro
Publisher: Cengage
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Chapter 7, Problem 28E
Make a drawing, such as Figure 7.3, which shows how a yellow object can interact with white light to appear yellow.
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In the initial linear section of the stress-strain curve of a metal or alloy. Explain from the point of view of atomic structure?(a) No, the atomic level properties of the material can never be related to the linear section.(b) The elastic zone is influenced by the strength of the bonds between atoms.(c) The stronger the bond, the less rigid and the lower the Young's Modulus of the material tested.(d) The stronger the bond, the less stress is necessary to apply to the material to deform it elastically.
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In natural rubber or polyisoprene, the trans isomer leads to a higher degree of crystallinity and density than the cis isomer of the same polymer, because(a) it is more symmetrical and regular.(b) it is less symmetrical.(c) it is irregular.
Chapter 7 Solutions
Chemistry In Focus
Ch. 7 - Prob. 7.1YTCh. 7 - The lasers used in supermarket scanners emit red...Ch. 7 - Which photons contain more energy, X-ray photons...Ch. 7 - Arrange the kinds of light listed below in order...Ch. 7 - Prob. 1ECh. 7 - What kinds of molecules are responsible for the...Ch. 7 - Prob. 3ECh. 7 - Prob. 4ECh. 7 - What is the relationship between the wavelength of...Ch. 7 - Prob. 6E
Ch. 7 - Prob. 7ECh. 7 - What prevents large amounts of high-energy UV and...Ch. 7 - Prob. 9ECh. 7 - Prob. 10ECh. 7 - Prob. 11ECh. 7 - Prob. 12ECh. 7 - Prob. 13ECh. 7 - Prob. 14ECh. 7 - Prob. 15ECh. 7 - Prob. 16ECh. 7 - Describe how a laser works.Ch. 7 - Classify each of the following lasers as to type...Ch. 7 - Prob. 19ECh. 7 - Prob. 20ECh. 7 - Prob. 21ECh. 7 - Prob. 22ECh. 7 - Prob. 23ECh. 7 - The speed of sound is 330m/s. If fireworks are...Ch. 7 - The nearest star, Alpha Centauri, is 4.3 light-...Ch. 7 - Counting the seconds between a flash of lightning...Ch. 7 - Make a drawing, such as Figure 7.3, which shows...Ch. 7 - Make a drawing, such as Figure 7.3, which shows...Ch. 7 - Prob. 29ECh. 7 - Arrange the following three frequencies of light...Ch. 7 - Prob. 31ECh. 7 - Which wavelength of light is most likely to cause...Ch. 7 - List two types of electromagnetic radiation that...Ch. 7 - List two types of electromagnetic radiation that...Ch. 7 - Prob. 35ECh. 7 - Prob. 36ECh. 7 - Prob. 37ECh. 7 - Prob. 38ECh. 7 - Calculate the wavelength of the radio waves used...Ch. 7 - Calculate the wavelength of the radio waves used...Ch. 7 - Prob. 41ECh. 7 - Prob. 42ECh. 7 - Prob. 43ECh. 7 - A lamp emits red light of 671nm. What element is...Ch. 7 - Prob. 45ECh. 7 - Prob. 46ECh. 7 - Prob. 47ECh. 7 - Prob. 48ECh. 7 - Describe how white light interacts with a colored...Ch. 7 - Prob. 50ECh. 7 - Prob. 51ECh. 7 - Prob. 52ECh. 7 - Prob. 53ECh. 7 - Prob. 54ECh. 7 - Prob. 55ECh. 7 - Prob. 56ECh. 7 - Prob. 57ECh. 7 - Prob. 58ECh. 7 - Prob. 59E
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- Most ceramic materials have low thermal conductivities because:(a) Electron mobility is strongly restricted due to their strong ionic-covalent bonding.(b) False, in general they are excellent thermal conductors (they are used in ovens).(c) Electron mobility is dependent on T and therefore they are poor conductors at high temperatures.(d) Electron mobility is very restricted by secondary bonds.arrow_forwardResistivity and electrical conductivity.(a) In metals, resistivity decreases.(b) In metals, resistivity decreases and conductivity in semiconductors also decreases with increasing temperature.(c) With increasing temperature, resistivity in metals and conductivity in semiconductors also increases.(d) None of the above.arrow_forwardState the difference between concrete and Portland cement.(a) There are no differences, in concrete the chemical composition is silicates and in cement aluminates.(b) The chemical composition of concrete is based on silicates and in cement aluminates.(c) Concrete is composed of aggregates bound by cement and cement "only" contains different minerals.(d) Cement is aggregates bound by concrete.arrow_forward
- Amorphous polymers are usually transparent and semi-crystalline polymers are usually opaque. Correct?(a) No. They are all made up of polymer chains. True if they were monomers.(b) Yes. The arrangement of the chains determines the passage of light.(c) No. It is the other way around.(d) Crystallinity or amorphousness does not affect the transparency or opacity of the material.arrow_forwardThe name ferrites refers to a family of(a) ceramic materials that exhibit ferrimagnetic behavior due to their ionic composition.(b) polymeric materials that exhibit ferrimagnetic behavior due to their ionic composition.(c) concrete-based materials that exhibit ferrimagnetic behavior due to their ionic composition.(d) superconducting materials that exhibit ferrimagnetic behavior due to their ionic composition.arrow_forwardState the two main factors affecting ion packing in the solid state.(a) Number of covalent bonds and their unsaturation.(b) Mechanical properties and degradation temperature.(c) Number of crystalline phases present and grain size.(d) Electroneutrality and ion size.arrow_forward
- The ceramic materials alumina (Al2O3) and chromium oxide (Cr2O3) form an isomorphic phase diagram. The solubility will be(a) unlimited of one ceramic in the other.(b) very limited depending on the weight % of Al2O3(c) very limited depending on the weight % of Cr2O3(d) partial of one ceramic in the other.arrow_forwardAmong the main characteristics of optical fibers, indicate which of the following is not included:(a) Opacity and Rigidity(b) Flexibility(c) Transparency(d) Low thicknessarrow_forwardMost ceramic materials have low thermal conductivities because(a) Electron mobility is strongly restricted due to their strong ionic-covalent bonding.(b) False, in general they are excellent thermal conductors (they are used in ovens).(c) Electron mobility is dependent on T and therefore they are poor conductors at high temperatures.(d) Electron mobility is highly restricted by secondary bonds.arrow_forward
- Si increases its conductivity when doped with Ga and P.(a) True, because the conduction mechanism is due to electrons and holes generated by Ga and P as the case may be.(b) True, because a completely different compound is generated.(c) False, because when impurities are introduced, the opposite occurs.(d) False, because the conductivity of Si is only determined by the increase in temperature, which must be controlled.arrow_forwardIndicate whether a configuration and a microstate are the same:a) Yesb) No, a microstate encompasses several configurationsc) No, a configuration is the same as a macrostated) No, a configuration encompasses several microstatesarrow_forwardThe representation of a one-dimensional velocity distribution function for a gas, with increasing temperature the maximum occurs for vi = 0 m/s. Correct?arrow_forward
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