110 Fa07 ex1 A - Chemistry 110 Exam I Form A Name Section Student No CHEMISTRY 110 EXAM 1 FORM A-1 A cube of an unknown substance measures 10.0 cm

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Chemistry 110 Name _______________________ Exam I Form A Section _______________________ September 24, 2007 Student No. _______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 28 questions on this exam. Check that you have done all of the problems and filled in the first 28 bubbles on the scantron. The maximum score on this exam is 28 points. Your score will be reported in percents (max 100%). Exam policy Calculators with text-programmable memory are not allowed. Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your grade will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (under "News"). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. Pay attention to units and magnitudes (decimal places) of numbers obtained from calculations. There is no penalty for guessing. CHEMISTRY 110 EXAM 1 SEPTEMBER 24, 2007 FORM A ------------------------------------------------------------------------------------------------------------ 1. A cube of an unknown substance measures 10.0 cm on one side. The mass of the cube is 1.89 kg. What is the unknown’s density (in g/cm 3 )? A. 0.189 g/cm 3 B. 1.89 g/cm 3 C. 18.9 g/cm 3 D. 189 g/cm 3 E. none of the above is correct ----------------------------------------------------------------------------------------------------------- 2. How many protons, neutrons, and electrons are in a 51 Cr 3+ ion? A. p = 24, n = 27, e = 27 B. p = 27, n = 24, e = 21 C. p = 24, n = 51, e = 21 D. p = 51, n = 21, e = 27 E. p = 24, n = 27, e = 21 ---------------------------------------------------------------------------------------------------------- 3. Which is an allowed set of quantum numbers for an electron in a d-orbital? A. n = 3, l = 2, m l = –3, m s = +1/2 B. n = 3, l = 2, m l = 1, m s = –1 C. n = 3, l = 0, m l = 0, m s = –1/2 D. n = 3, l = 2, m l = 2, m s = +1/2 E. n = 4, l = 1, m l = 0, m s = +1/2 ---------------------------------------------------------------------------------------------------------- 4. Which one of the following has the largest radius?
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This note was uploaded on 05/24/2009 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

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110 Fa07 ex1 A - Chemistry 110 Exam I Form A Name Section Student No CHEMISTRY 110 EXAM 1 FORM A-1 A cube of an unknown substance measures 10.0 cm

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