CHM 102 D - CHM-102 NAME Key Exam I I Form B Summer 2010...

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Page 1 of 9 CHM-102 Exam I I Summer 2010 Form B NAME Key Raw Score T-Score You will have 70 minutes to complete the exam. There is one best answer to each question and all questions are worth the same number of points. Sign your name on the answer sheet above the General Purpose logo on the front. Write the form of the test you are taking next to your name. Print and fill in your name ( last name- space -first name ) on the back of your answer sheet. Be sure to mark the correct answers on your exam booklet so you can compare your answers to the answer key. An answer key will be posted immediately following the test at the course website as well as outside DO-236. 1. Iron metal crystallizes with a body-centered-cubic unit cell. The unit cell edge length is 323 pm. What is the radius (in pm) of an iron atom? a. 114 pm b. 162 pm c. 140 pm d. 746 pm 2. Based on the graph given below, what is the approximate boiling point of ethanol at 0.45 atm pressure? a. 80 °C b. 20 °C c. 40 °C d. 60 °C
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Page 2 of 9 3. What amount of thermal energy (Q) is given off when 10 g of water, initially at 10 o C, are converted to ice at 0 o C? [The specific heat of water (C) is 4.18 J/g·K and Δ H fus = 6.01 kJ/mol]
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