PracticeExam1a - r Chem 202 Practice Hour Exam I for Oct....

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Chem 202 Practice Hour Exam I for Oct. 2008 Prof. Gruebele Instruction Page Name: Signature: Student ID No: Quiz Sect: TA: The midterm will contain 21 multiple choice questions (4 pts. ea.) and one word problem (16 pts.), similar to the examples shown here. Fill in your name, signature, student ID no., quiz section and TA name above. On the bubble answer sheet fill in the same type of information; use just the two "important" digits of your quiz section under "class" and follow instructions on the board. Failure to fill in all information may delay grading of your exam. You may write on any part of the exam; however, only bubbles filled in on the answer sheet will count as credit for the multiple choice questions; only answers written in the boxed spaces provided on the exam will count for the essay question. Turn in the exam and the answer sheet at the end of the hour. For rough work, use only the loose sheets provided. Work on loose sheets will not be collected, and will not be counted. The exam booklet will be returned to you next quiz section. Instructions: Do not begin the exam until you are told to do so; in the meantime, fill in the information requested below. Practice exam time: 30 minutes, relative to 1 hr. on actual exam Chem 202 Fall 2008 Hour Exam I 10-08 Name: TA: Section: PAGE 1 1) The atomic number of which element is 16? a) oxygen b) potassium c) sulfur d) phosphorus e)none of these r 0 0 V(r) a) r 0 0 V(r) b) 2) Which of these is a reasonable potential energy curve for NO? r 0 0 V(r) c) r 0 0 V(r) d) r 0 0 V(r) e) (ii) In question 3, what hybridization best describes the atom shown labeled (labels refer to N,C or O, not any H's that are not shown) 3) atom (ii): a) sp b) sp c) sp 3 2 H H CO 3 N N H HO H C=CH 2 4) Which of the following orderings is in terms of DECREASING atomic radius? a) Ca ++ , K + , Ar, Cl - b) Ar, K + , Ca ++ , Cl - c) Cl - , Ca ++ , K + , Ar d) Cl - , Ar, K + , Ca ++ e) none 5) Blood plasma contains approximately 7% by mass of the protein albumin. How many moles of this protein are contained in 1 liter of blood plasma? (M.W. (albumin) = 69,000 grams/mole; density of blood plasma = 1.06 kg/liter.) a) 9.57 . 10 -4 b) 1.01 . 10 -3 c) 986 d) 992 e) 1.08 . 10 -3 6) What is the elctron configuration of Scandium? a) [Ar] 4s 2 3d 1 b) [Ar] 3s 2 3d 1 c) [Ar]4s 3 d) [Ar]3s 2 2d 1 e)[Kr]-4s 2 3d 1 7) The laser in a CD player (which reads reflective grooves on the CD surface) has a wavelength of 780 nanometers. What is the energy of a single photon from this CD player in Joules? a) 1.7.10 -50 b) 1.7.10 -45 c) 2.6.10 -26 d) 2.6.10 -19 e) none of these Note: no transition metals on exam!
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PAGE 2 8) Consider the HF + molecule. Which MO diagram showing 1s(H) and 2p z (F) orbitals best describes the bonding? a)
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PracticeExam1a - r Chem 202 Practice Hour Exam I for Oct....

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