Ex-1-3530-S10

Ex-1-3530-S10 - CHEM 3530 - Exam 1 February 12, 2010 (57)...

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CHEM 3530 - Exam 1 – February 12, 2010 (57) PART I. MULTIPLE CHOICE (Circle the ONE correct answer) 1. A sample of decane, C 10 H 22 , contains 5.0x10 24 atoms of Hydrogen. What is the mass of the sample? (A) 28.4 g (B) 53.6 g (C) 1180 g (D) 2.6x10 4 g 2. The volume of a sample of N 2 (g) at 600 torr and 200 o C is 400 mL. What is the volume of the N 2 at 350 torr and 100 o C? (A) 184 torr (B) 340 torr (C) 540 torr (D) 870 torr 3. A 20. L container contains 1.2x10 24 molecules of CO 2 at a temperature of 150 o C. What is the pressure of the gas, in bar . (A) 1.2 bar (B) 350 bar (C) 28.4 bar (D) 3.5 bar 4. A sample of an unknown gas has a density of 6.0 g/L at a temperature of 300 K and pressure of 250 kPa. The Molar Mass of this sample is: (A) 38.6 g/mol (B) 60 g/mol (C) 82 g/mol (D) 114 g/mol 5. A container has a gaseous mixture of 8.0 grams of He(g) and 96. grams of CH 4 (g). The partial pressure of He(g) in the mixture is 0.3 bar. What is the total pressure of both gases? (A) 3.9 bar (B) 2.4 bar (C) 1.2 bar (D) 0.9 bar 6. The RMS average speed of SO 2 molecules at 1000 o C is 700 m/s. What is the RMS average speed of SO 2 molecules at 25 o C? (A) 340 m/s (B) 160 m/s (C) 110 m/s (D) 1450 m/s 7. The RMS average speed of SO 2 molecules at 1000 o C is 700 m/s. What is the RMS average speed of C 2 H 6 molecules at 1000 o C?
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This note was uploaded on 04/12/2011 for the course CHEM 3520 taught by Professor Staff during the Fall '08 term at North Texas.

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Ex-1-3530-S10 - CHEM 3530 - Exam 1 February 12, 2010 (57)...

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