q6p302 and q6p302key

q6p302 and q6p302key - CH302 TA Practice Quiz 6 In...

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CH302 TA Practice Quiz 6 In principle this can be done without a calculator if you use the hints provided and a piece of scratch paper. Note: ln 2 = .693 1. Consider the reaction below. Which of the following is the correct rate expression? 2A + B 2C a. - [A]/(2 t) = - [B]/( t) = [C]/( t) b. - [A]/( t) = - [B]/(2 t) = - [C]/( t) c. [A]/(2 t) = - [B]/( t) = [C]/(2 t) d. - [A]/(2 t) = - [B]/( t) = [C]/(2 t) 2. Consider the data below: Experiment Initial [Xe] (M) Initial [F 2 ] (M) Initial Rate (M/sec) 1 0.5 0.25 0.00156 2 1.5 1.0 0.05625 3 0.75 0.25 0.0032 4 1.50 0.25 0.01406 5 0.5 1.0 0.00625 Which of the following is a correct rate law for the reaction between Xe and F 2 ? a. r = k[Xe][F 2 ] b. r = k c. r = k[Xe][F 2 ] 2 d. r = k[Xe] 2 [F 2 ] 3. What is the order of the reaction if k = 5 x 10 7 M -2 s -1 ? a. 1st order b. 2nd order c. 3rd order d. 0th order 4. Consider a reaction with the activation energy of 1.6 kJ/mol. At room temperature k = 2.3x10 3 s -1 . Calculate the temperature when the rate constant is 2.2x10 3 s -1 . (Hint: ln(0.9565) = -0.045) a. 279K b. 300K c. 298 K d. 295 K

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5. You sneak 500 Cheetos into a movie theatre where the movie playing is 90 minutes long. If the rate constant for your Cheetos-eating is 5 Cheetos per minute, how many Cheetos do you have in your possession when a theatre-employee throws you out of the movie for texting after 40 minutes? a. None, he forcefully removed them from you along with your cell phone. b. 200 c. 300 d. 50 6. If the half life of a compound is 13.86 seconds and it decays in a first order reaction, what is the reaction constant, k? [C 0 ] = 2 M a. .05 M/s b. .072 M/s c. .05 s -1 d. .072 s -1 7. Which of the following statements about collision theory is incorrect? a. Collision theory derives from many
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q6p302 and q6p302key - CH302 TA Practice Quiz 6 In...

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