CHM 11500 Final Exam | Questions and Answers | 2025 Update | 100% Correct.

Test #A


Name _____KEY_____________ __ Chemistry 11500

Section ____________ FINAL EXAM Total Points = 300

TA ___________________________ Monday, 8:00 AM

April 29, 2024


Directions:

1. Each student is responsible for following directions. Read this page carefully.

2. Write your name and other requested information on this page and on the separate answer
sheet.

3. CODE your name on the answer sheet using an ordinary (#2) pencil.

4. CODE your correct 10-digit identification number (PUID) on the answer sheet. THIS IS
VERY IMPORTANT!

5. CODE your lab section number on the answer sheet. Please use all four digits, 0101, 0102,
0201, etc. This is also very important!

6. CODE the test number shown in the upper right-hand corner on the answer sheet in the
block labeled Test/Quiz Number. This is Test Form #A.

7. Put all calculations on the examination pages. DO NOT PUT ANY EXTRA MARKS
ON THE COMPUTER ANSWER SHEET!

8. This exam consists of 40 multiple-choice questions worth 7.5 points each. Choose the one
best or correct answer for each question and write it both on your exam paper and on the
computer answer sheet. The computer answer sheet is the only one that will be graded!

9. This exam consists of 13 pages plus 3 pages of useful information, a Periodic Table, a band
of stability, and a blank sheet of paper. Please check to be sure that you have them all!




KEEP YOUR ANSWERS AND WORK COVERED TO PROTECT
THE INTEGRITY OF YOUR WORK!!

,CHM 11500 Final Exam 04/29/24



_______ 1. Which one nuclide listed below is produced when thorium ( 232
90Th) undergoes three α-
—
decays and two β decays?

(a) radium-232 ( 232
88Ra)
𝟐𝟐𝟐𝟐𝟐𝟐
(b) radon-220 ( 𝟖𝟖𝟖𝟖𝐑𝐑𝐑𝐑)
(c) actinium-224 ( 224 89Ac)
220
(d) lead-220 ( 82Pb)
(e) polonium-220 ( 220 84Po)




_______ 2. Which row is correct for a neutral ( 80
35Br) atom?




(a)
(b)
(c)
(d)
(e)



_______ 3. How many oxygen atoms are in 284.1 g of sodium sulfate, Na2SO4? (Na = 22.99 amu; S =
32.07 amu; O = 16.00 amu)

(a) 1.205 x 1024
(b) 2.409 x 1024
(c) 4.818 x 1024
(d) 5.748 x 1024
(e) 1.205 x 1026


_______ 4. A system is compressed from an initial volume of 5.100 L to a final volume of 3.050 L by
an external pressure of 0.9250 atm. Calculate the work involved in joules.
(1 L-atm = 101.3 J)

(a) – 763 J
(b) –192.1 J
(c) 1.896 J
(d) 192.1 J
(e) 763.7 J




2

, CHM 11500 Final Exam 04/29/24

_______ 5. For the following reactions at constant pressure, determine which one is wrong.

(a) 2H2(g) + O2(g) ⟶ 2H2O(g) Work done by system
(b) CCl4(g) + 2 F2(g) ⟶ CF4(g) + 2 Cl2(g) No work is done
(c) NH3(g) + HBr(g) ⟶ NH4Br (s) Work done on system
(d) 3H2(g) + N2(g) ⟶ 2 NH3(g) Work done on system
(e) 2 ClF3(g) ⟶ Cl2(g) + 3 F2(g) Work is done by system



_______ 6. The electron configuration shown below can belong to either an atom or an ion. Pick the one
wrong answer.




(a) Na+
(b) Cl-
(c) S2-
(d) K+
(e) Ar


_______ 7. An element in period 3 has the following ionization energies (in eV):
What is the atomic number of this element?

IE1 IE2 IE3 IE4 IE5 IE6 IE7
8.2 16.3 33.5 45.1 166.8 205.1 246.5

(a) 13
(b) 14
(c) 15
(d) 32
(e) 33


_______ 8. The lattice energy of SrCl2 is defined as which one of the following processes.


(a) Sr(s) + Cl2 (g) → SrCl2(s)
(b) Sr(g) + 2Cl(g) → SrCl2(s)
(c) Sr2+(s) + 2Cl–(g) → SrCl2(g)
(d) Sr2+(g) + 2Cl–(g) → SrCl2(s)
(e) SrCl2(aq) → SrCl2(s)
3