Download Chemistry Exam - Fall 2002 (CHEM 1110) - Prof. James B. Condon and more Exams Chemistry in PDF only on Docsity!
CHEM 1110 test 2 - Dr. Condon’s sections - fall 2002 Do not write on this test. Use the answer sheet to indicate your answer.
- For the following reaction, calculate the mass of KCl produced from 53.2 g of KClO 3 2KClO 3 !2KCl + 3O 2
a. 16.2 g b. 12.5 g c. 87.4 g d. 21.5 g e. 32.4 g
- Which of the following is the electron configuration for chromium, Cr?
a. [Ar] 4s^2 , 3p^4 b. [Kr] 4s^2 , 3d^4 c. [Kr] 3d^6 d. [Ar] 4s^2 , 3d^4 e. [Ar] 3d^6
- Which of the following are quantum numbers for an electron in an atom which are allowed by the selection rules?
a. n = 1 , l = 1, ml = 0, ms = +½ b. n = 2 , l = 1, ml = 0, ms = +½ c. n = 2 , l = -1, ml = 0, ms = -½ d. n = 2 , l = 0, ml = -1, ms = +½ e. n = 2 , l = 0, ml = 0, ms = +
- Which of the following arrangement of atomic size (radius) from large to small? Large on Left ------------> Small on Right
a. O, N, Mg, Al b. Mg, Al, O, N c. Mg, Al, N, O d. O, N, Al, Mg e. Al, Mg, N, O
- Calculate the mass of AgCl that could be precipitated (formed) when a solution containing 7.00 g of NaCl is reacted with a solution containing 4.00 g of AgNO 3. AgNO 3 + NaCl !AgCl + NaNO 3
a. 0.0235 g b. 8.25 g c. 3.38 g d. 17.2 g e. 2.00 g
- Phosphorous, P, has a higher ionization energy than sulfur, S. The reason for this is:
a. P has a half filled p which is favored in this case over the p^4 configuration. b. This follows the general trend for the periodic chart. c. P has fewer electrons so they are easier to remove than those for S. d. S is a smaller atom than P. e. The electron affinities compensate for this trend.
- Which of the following summarizes the Pauli exclusion principle?
a. Electrons should singly fulfill ml before a switch to a different value of ms. b. The half filled p is an especially stable electron configuration. c. The most stable electron configuration is the noble gas (filled p) configuration. d. No two electrons may have the same set of quantum numbers. e. Electron affinities decrease across the periodic chart to fluorine.
- Which of the following summarizes Hund’s rule?
a. Electrons should singly fulfill ml before a switch to a different value of ms. b. The half filled p is an especially stable electron configuration. c. The most stable electron configuration is the noble gas (filled p) configuration. d. No two electrons may have the same set of quantum numbers. e. Electron affinities decrease across the periodic chart to fluorine.
Note: In the following reactions, no attempt has been made to present the proper balancing!
- What are the products for the following reaction in dry conditions? Na + O 2!?
a. Na 2 O b. NaO c. Na 2 O 2 d. Na 2 O 3 e. NaO 2
- What are the products for the following reaction in dry conditions? Li + O 2!?
a. Li 2 O b. LiO c. Li 2 O 2 d. Li 2 O 3 e. LiO 2
1.e
2.d
3.b
4.c
5.c
6.a
7.d
8.a
9.c
10.a
11.c
12.b
13.a
14.b
