Spring+2008+1332+Final - 1332 SPRING 2008 FINAL EXAM NO...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1332 SPRING 2008 FINAL EXAM NO CHEATING 1. Of the gases, Ne, N 2 , O 2 , CH 4 and SiH 4 , which one would you expect to be easiest to liquefy? (A) Ne (B) N 2 (C) O 2 (D) CH 4 (E) SiH 4 2. What is the amount of heat absorbed by 10.0 grams of ice at -150 o C in coverting it to liquid water at 50.0 o C. (specific heat of H 2 O(s) = 2.09 J/g o C, specific heat of H 2 O(l) = 4.18 J/g o C, heat of fusion of H 2 O(s) = 333 J/g) (A) 5.73 x 10 3 J (B) 6.76 x 10 2 J (C) 1.70 x 10 2 J (D) 2.83 x 10 3 J (E) 3.29 x 10 3 J 3. What mass in grams of a molecular substance (molar mass = 50.0 g/mol) must be added to 500 g of water to produce a solution that boils at 101.54 o C? (K bp = 0.512 o C/m for water.) (A) 75 g (B) 150 g (C) 100 g (D) 30 g (E) 50 g 4. Which of the following would have a boiling point closest to that of 1 m NaCl? (A) pure H 2 O (B) 1 m sucrose (C 12 H 22 O 11 ) (C) 1 m MgCl 2 (D) 0.5 m CH 3 OH (E) 1 m NH 4 NO 3 5. 8.60 g of a protein was dissolved in enough water to produce 75.0 mL of solution. If this solution has an osmotic pressure of 0.959 atm at 25.0 °C, what is the molar mass of the protein in g/mol? (A) 2.93 (B) 220 (C) 2920 (D) 2680 (E) 3560 6. The decomposition of dinitrogen pentoxide, 2N 2 O 5 (g) → 4NO 2 (g) + O 2 (g), is first order with a rate constant of 5.1 x 10 -4 s -1 at 45 o C. How long will it take to convert 7/8 of the starting material? (A) 1.3 x 10 3 s (B) 32 min (C) 2.7 x 10 2 s (D) 4.1 x 10 3 s (E) 44 min
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7. What is the rate law for the reaction CO(g) + Cl 2 (g) → COCl 2 (g) given the following data obtained at a certain temperature for this reaction. [CO] t=0 (M) [Cl 2 ] t=0 (M) Initial Rate (M/s) 1.00 0.100 1.29 x 10 -29 0.100 0.100 1.33 x 10 -30 0.100 1.00 1.30 x 10 -29 0.100 0.0100 1.32 x 10 -31 (A) rate = k[CO][Cl 2 ] (B) rate = k[CO] 2 [Cl 2 ] (C) rate = k[CO] (D) rate = k[CO][Cl 2 ] 2 (E) rate = k[CO][Cl 2 ] 1/2 8. If the activation energy of a certain reaction is 50 kJ/mole by what factor does the rate constant increase when the temperature is raised from 25 o C to 300 o C? (A) 1.6 x 10 4 (B) 6.2 x 10 -5 (C) 6.9 x 10 44 (D) 1.01 x 10 0 (E) 9.7 9. Which of the following mechanisms is consistent with the observed rate law, rate = k[H 2 ][Br] 1/2 , for the reaction H 2 (g) + Br 2 (g) → 2HBr(g)? Mechanism I
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/16/2011 for the course BIOL 1361-1362 taught by Professor Any during the Spring '08 term at University of Houston.

Page1 / 8

Spring+2008+1332+Final - 1332 SPRING 2008 FINAL EXAM NO...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online