CHM 121 Final-Fall2010-2.doc - CHM 121 Fall 2010 Final Exam Total Points = 100 2 Bonus points Maximum Time Allowed = 2.5 Hrs Name-Section-Name of the

CHM 121 Final-Fall2010-2.doc - CHM 121 Fall 2010 Final Exam...

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CHM 121: Fall 2010 Final Exam Total Points = 100 (+ 2 Bonus points), Maximum Time Allowed = 2.5 Hrs Name --------------------------------------- Section--------------------------------------- Name of the instructor ---------------------------------- Part – I ( 31 x 2 = 62 points) Please, circle the most appropriate option. In order to change your answer, cross out the previously opted option. 1.How many significant figures are contained in the 0.08206? (a)2 (b) 3 (c) 4 (d) 5 (e) 6 2. 2 2 3 10 * 00 . 2 10 * 012 . 8 10 * 25 . 3 (a) 2.06 x 10 -2 (b) 2.1 x 10 -2 (b) 3.856 x 10 -2 (c) 38.56 (e) 3.856 3.Which of the following condition will cause you to get higher density?
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4.Volume of the water that will be displaced by 11.2 g of a metal sample, whosedensity is 3.1 g/cc. (1 cc = 1 mL) 5.At the end of the chromatography experiment, the distance travelled by dye R1 is 2.49 cm and that by the solvent front is 3.52 cm. The calculated Rfvalue of dye R1 is 6.Consider the following paper chromatography data Rf values of different dyes Solvent system B1 B2 R40 G1 X 0.41 0.71 0.23 0.85 Y 0.66 0.67 0.21 0.55 Z 0.81 0.82 0.67 0.24 The best solvent system for the separation of a mixture that could contain one or more of the dyes: B1, B2, R40 and G1 (a) X (b) Y (c) Z(d) Y or Z (e) None 7.Which of the following is chemical change? 8.Which of the following can be dissolved in water?
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9.Which one is correct while heating copper sulfate pentahydrate?
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  • Summer '19
  • Chemistry, Mole, ml, Sodium hydroxide, copper sulfate pentahydrate, Gas B

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