Practice Exam 2 Fall 2008 for Students

Practice Exam 2 Fall 2008 for Students - Version 001...

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Version 001 – Practice Exam 2 – Brodbelt – (90000) 1 This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points Consider 2 Al + 6 HCl 2 AlCl 3 + 3 H 2 , the reaction oF Al with HCl to produce hy- drogen gas. What is the pressure oF H 2 iF the hydrogen gas collected occupies 14 L at 300 K and was produced upon reaction oF 4 . 5 mol oF Al? Assume the yield oF the reaction is 65.0 percent. Assume the volume, tempera- ture, moles, and pressure are actually known to three signfcant fgures. 1. 0.233 atm 2. 8.91 atm 3. 5.28 atm 4. 0.0763 atm 5. 7.72 atm 6. 11.9 atm 002 10.0 points ±or the reaction 2 HCl + Na 2 CO 3 2 NaCl + H 2 O + CO 2 8.0 moles oF CO 2 is collected at STP. What is the volume oF CO 2 ? 1. 57.6 L 2. 0.0250 L 3. 22.4 L 4. 179 L 5. 2.80 L 6. 0.357 L 003 10.0 points A 750.0 mL metal bulb is flled with 0.421 g oF CH 4 and an unknown mass oF NH 3 . IF the total pressure in the bulb is 3.77 atm at 315 C, then how much NH 3 is also in the bulb? 1. 14.5 grams 2. 0.00713 grams 3. 0.0323 grams 4. 2.39 grams 5. 0.996 grams 6. 1.17 grams 7. 0.549 grams 004 10.0 points A 6.35 L sample oF carbon monoxide is col- lected at 55.0 C and 0.892 atm. What volume will the gas occupy at 1.05 atm and 59.0 C? 1. 4.82 L 2. 6.68 L 3. 1.96 L 4. 6.10 L 5. 5.46 L 005 10.0 points What is the bond angle defned by the oxy- gen, carbon, and one oF the hydrogen atoms in Formaldehyde (CH 2 O)? 1. 120 2. 90 3. 180
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Version 001 – Practice Exam 2 – Brodbelt – (90000) 2 4. 110 006 10.0 points What is the molcular shape of COCl 2 ?. 1. square planar 2. seesaw 3. trigonal pyramidal 4. tetrahedral 5. trigonal planar 6. octahedral 007 10.0 points NO 2 and SO 2 are some of the most important gases in the atmosphere because 1. they generate ozone which helps re-build the ozone layer. 2. they destroy CO and CO 2 . 3. they serve as a barrier to damaging UV radiation. 4. they emit light which results in blue sky and red sunsets. 5. they are the primary reactants responsi- ble for smog and acid rain. 6. they react to form thunderstorms. 008 10.0 points Consider the compound peroxyacetylni- trate, an eye irritant in smog. O N C O O O O H 3 C Predict the indicated bond angle.
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This note was uploaded on 07/27/2009 for the course CH 89959 taught by Professor Cowley during the Spring '09 term at University of Texas at Austin.

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Practice Exam 2 Fall 2008 for Students - Version 001...

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