CHEM 1372 Final Exam 3

CHEM 1372 Final Exam 3 - Title: Started: FE May 1, 2008...

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Title: FE Started: May 1, 2008 4:21 PM Submitted: May 1, 2008 6:12 PM Time spent: 01:51:40 Total score: 26/30 = 86.67% Total score adjusted by 0.0 Maximum possible score: 30 1. The hypothetical metal Q has two isotopes, 50Q (isotopic mass 49.9715 amu, abundance 24.32%), 52Q (isotopic mass 51.9663 amu). Calculate the atomic mass of Q to two decimal places and do not put units. Student Respons e Correct Answer Answer 51.48 51.48 Score: 1/1 2.
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An atom of the isotope chlorine-39 consists of how many protons, neutrons, and electrons? (p = proton, n= neutron, e = electron) Stude nt Respo nse Corre ct Answ er a. 17 p, 17 n. 22 e b. 39 p, 38 n, 39 e c. 22 p, 17 n, 17 e d. 17 p, 39 n, 17 e e. 17 p, 22 n, 17 e
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3.
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In a hydrogen atom, from what energy level must an electron fall to the n = 3 level to give a line at 1.28 m in the infrared region? Stude nt Respo nse Corre ct Answ er a. 2 b. 4 c. 5 d. 6 e. 7 Score:
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Which of the following quantum number combinations are allowed? Stude nt Respo nse Correc t Answ er a. n = 2; l = 0; ml = – 1 b. n = 4; l = 3; ml = – 1 c. n = 5; l = 2; ml = +3 d. n = 2; l = 0; ml = +1 e. none
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Give names for the formulas or formulas for the names of the following compounds: N2O3 Stude nt Respo nse Correc t Answ er a. nitrog en oxide( III) b. dinitro gen oxide( III) c. nitrog en trioxid e d. dinitro gen trioxid e
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6. Propane, C3H8, is widely used in liquid form as a fuel for barbecue grills and camp stoves. Given 34.4 g propane, calculate the moles of the compound to three significant dgits. Student Respons e Correct Answer Answer .782 0.78 Score: 1/1 7.
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A) Cs2+ B) Cl- C) S2- D) Al3+ E) Br2-
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This note was uploaded on 12/07/2010 for the course CHEM 1372 taught by Professor Staff during the Fall '08 term at University of Houston.

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CHEM 1372 Final Exam 3 - Title: Started: FE May 1, 2008...

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