HW CH2,7 - 12/18/11 View Attempt Vie Attempt 3 of 5 T it...

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Unformatted text preview: 12/18/11 View Attempt Vie Attempt 3 of 5 T it le: C 2,7HW1a St art ed: Sept ember 12, 2011 12:24 PM Submit t ed: Sept ember 12, 2011 12:59 PM T ime spent : 00:34:52 Total score: 9/10 = 90% T ot al sc ore adjust ed b 0.0 Ma imum possible sc ore: 10 Done 1. An iron- 56 nuc leus c ont ains Student Response C orrect Ans er A. 56 prot ons and 26 neut rons. B. 30 prot ons and 26 neut rons. C. 26 prot ons and 26 neut rons. D. 56 prot ons and 56 neut rons. E. 26 prot ons and 30 neut rons. Sc ore: 1/1 2. What is t he sum of t he numbers of neut rons and elec t rons in t he ion 72As2+? Student Response Ans er: C orrect Ans er 70 70 Sc ore: 1/1 3. Suppose t hat a sample of magnesium has t hree isot opes, 24Mg (isot opic mass 23.9850 amu, abundanc e 78.99%), 25Mg (isot opic mass 24.9858 amu, abundanc e 10.00%), and 26Mg (isot opic mass 25.9826 amu, abundanc e 11.01%). Calc ulat e t he at omic mass of magnesium in t he sample. Student Response C orrect Ans er A. 24.3 amu B. 24.20 amu C. 24.35 amu D. 24.15 amu E. 21.45 amu learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=4524598 1/3 12/18/11 View Attempt S : 1/1 4. H C .E M. Student Response C orrect Ans er 1. M S : A E AM manganese (100%) 1/1 5. 1,083 .U AM ( H ). W ( )? T . Student Response Ans er: S C orrect Ans er 2.77 2 277 : 1/1 6. C 570 , , . Student Response C orrect Ans er A. 2.10 B. 3.48 C. 2.27 D. 2.10 E. 3.49 S : 10-22 1/1 7. A =5 H ? Student Response 1281 .T C orrect Ans er A. 3 B. 9 C. 6 D. 1 E. N S : learn.uh.edu/webct/urw/ 1/1 /ViewStudentAttempt.dowebct?attempt=4524598 2/3 12/18/11 View Attempt 8. What is t he t ot al number of orbit als is t he princ ipal shell n = 3? Student Response C orrect Ans er A. 1 B. 4 C. 8 D. 9 E. 18 Sc ore: 1/1 9. How many d orbit als reside in t he 5d subshell of a hydrogen at om? Student Response C orrect Ans er A. 1 B. 2 C. 3 D. 5 E. 7 Sc ore: 0/1 10. Whic h is no a possible ml value f or an orbit al t hat has t he f ollowing: n = 6, l = 2 Student Response C orrect Ans er A. +1 B. 1 C. 3 D. 2 Sc ore: 1/1 Done learn.uh.edu/webct/urw/ /ViewStudentAttempt.dowebct?attempt=4524598 3/3 ...
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This note was uploaded on 12/18/2011 for the course CHEM 1372 taught by Professor Staff during the Spring '08 term at University of Houston.

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