MTLS 1M03 Assignment 2 Attempt1

MTLS 1M03 Assignment 2 Attempt1 - Learning System Quiz...

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View Results Name: SIAMAK KIANI Attempt: 1 / 3 Out of: 18 Started: January 30, 2009 7:34pm Finished: January 30, 2009 9:04pm Time spent: 1 hr, 29 min., 13 sec. Question 1 (1 point) True or false? The solute is an element or compound present in the greatest amount. Student response: Correct Response Student Response Answer Choices a. True b. False General feedback: False . The solute is the element or compound present in a minor concentration. The solvent is the element or compound present in the greatest amount. Score: 1 / 1 Question 2 (1 point) Which of the following characteristics that relate to solutes and solvents (and their atoms) determine the degree to which the solute species dissolves in the solvent? Student response: Correct Response Student Response Answer Choices a. Atomic number b. Valence c. Atomic size d. Electronegativity value e. Crystal structure f. All of the above g. B, C, D, and E h. A, B, C, and D General feedback: The four features of the solute and solvent atoms that determine the degree to which the former dissolves in the latter are: Valence Atomic size Electronegativity value Crystal structure See page 69 of the text for more information. Score: 0 / 1 Question 3 (1 point) Calculate the energy for vacancy formation (in eV/atom) in a metal given that the equilibrium number of vacancies at 345°C is 6.53x10 24 per m 3 . The density and atomic weight for this metal are 11.6 g/cm 3 and 111 g/mol, respectively. Use decimal notation, digits after decimal: 3 Student response: Not answered Correct answer: 0.489 eV/atom General feedback: See pages 67-68 of the text for a similar example. Learning System Quiz Homepage http://webct.mcmaster.ca/SCRIPT/MATLS_1M03_T2_09/scripts/student/. .. 1 of 5 1/30/2009 9:05 PM
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Score: 0 / 1 ( Question not answered. ) Question 4 (1 point) For a Cu-Zn alloy that contains 22.15 at% Zn, what is the concentration of Cu (in wt%)? The atomic weights for Zn and Cu are 65.39 and 63.55 g/mol, respectively. Use decimal notation, digits after decimal: 2 Student response: Not answered Correct answer: 77.35 wt% General feedback: For help on composition conversions, please see page 71 of the textbook. An example similar to this question is given on page 73. Score:
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This note was uploaded on 02/08/2010 for the course MATLS 1M03 taught by Professor Okon during the Winter '09 term at McMaster University.

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MTLS 1M03 Assignment 2 Attempt1 - Learning System Quiz...

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