Practice Exam I

Practice Exam I - General Chemistry Sample Exam I, 100...

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Unformatted text preview: General Chemistry Sample Exam I, 100 Points McCallum • You have 80 minutes to complete this exam. • You may use a calculator, 4 × 6 card, and the provided periodic table and equation sheet. • Please box or otherwise indicate answers clearly. • Ambiguous or unreadable work will not be graded. • Read the questions carefully!! To be used only if you request a re-grade or grading correction: I wish to turn in this exam in for a possible re-grade. I have attached a note to indicate where I think the mistake was. I have not altered or added to my original answer in any way. I understand that altering an exam for a re-grade is considered cheating and will result in being reported to the Dean of Student Life for disciplinary action in addition to a grade of F for the course. (signed) Date Name: Student I.D.: Name: Student No.: 2 Multiple Choice questions. 48 Points Choose the best answer from the list of choices. Use your scantron sheet. Mark each answer clearly. Fully erase all changes. 1. Ham radio operators often broadcast on the 6-meter band. The frequency of this electromagnetic radiation is MHz. (a) 500 (b) 200 (c) 50 (d) 20 (e) 2.0 2. Of the following, radiation has the shortest wavelength. (a) x-ray (b) radio (c) microwave (d) ultraviolet (e) infrared 3. The energy of a photon that has a wavelength of 12.3 nm is J. (a) 1 . 51 × 10- 17 (b) 4 . 42 × 10- 23 (c) 1 . 99 × 10- 25 (d) 2 . 72 × 10- 50 (e) 1 . 62 × 10- 17 4. It takes 254 kJ / mol to eject electrons from a certain metal surface. What is the longest wave- length of light, in nm, that can be used to eject electrons from the surface of this metal via the photoelectric effect? (a) 472 (b) 233 (c) 165 (d) 725 (e) 552 5. An electron in a Bohr hydrogen atom has an energy of- 1 . 362 × 10- 19 J. The value of n for this electron is . (a) 1 (b) 2 (c) 3 (d) 4 (e) 5 Name: Student No.: 3 6. The wavelength of a car (1 . × 10 3 kg) travelling at 75 km / hr is m. (a) 3 . 2 × 10- 38 (b) 8 . 8 × 10- 39 (c) 3 . 2 × 10- 35 (d) 1 . 4 × 10- 35 (e) 1 . 4 × 10 35 7. How many orbitals are in the third shell? (a) 25 (b) 4 (c) 9 (d) 16 (e) 1 8. Which of the following sets of quantum numbers is not possible? (a) n = 6, l = 1, m l = (b) n = 3, l = 2, m l = 3 (c) n = 3, l = 2, m l = 2 (d) n = 1, l = 0, m l = (e) n = 3, l = 2, m l = 1 9. Which orbital is degenerate with the 5 p y orbital in a multi-electron atom? (a) 5 s (b) 5 p x (c) 4 p y (d) 5 d xy (e) 5 z 2 10. Which of the following configurations depicts an excited carbon atom? (a) 1 s 2 2 s 2 2 p 1 3 s 1 (b) 1 s 2 2 s 2 2 p 3 (c) 1 s 2 2 s 2 2 p 1 (d) 1 s 2 2 s 2 3 s 1 (e) 1 s 2 2 s 2 2 p 2 11. The 1 s orbital is the smallest in which of the following atoms?...
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This note was uploaded on 04/07/2008 for the course CHEM 027 taught by Professor Mccallum during the Spring '08 term at Pacific.

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Practice Exam I - General Chemistry Sample Exam I, 100...

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