CHEM quiz 2

CHEM quiz 2 - 1. (Points: 4) k 1. 2. 3. Increasing the...

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1.  (Points: 4)      For the reaction 2A + B C, the rate law is = k [A] 2 [B]. Which of the factor(s) will affect the value of the rate constant for this reaction? 1. 2. 3. a.  1 only b.  2 only c.  3 only d.  2 and 3 e.  1, 2, and 3   Save Answer     2.  (Points: 4)      What is the overall order of the reaction below 2 NO(g) + 2 H 2 (g) N 2 (g) + 2 H 2 O(g) if it proceeds via the following rate expression? = k[NO] 2 [H 2 ]
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1.  (Points: 4)    Paragraph  Insert equation    Save Answer     3.  (Points: 4)      Molecules must overcome a barrier called the activation energy if they are to react. The highest energy point reached during the progress of a reaction is called the ____. Paragraph  Insert equation    Save Answer     4.  (Points: 4)      What is the name given to a substance that increases the rate of a chemical reaction but is not itself consumed? Paragraph  Insert equation    Save Answer     5.  (Points: 4)      Ozone decomposes to oxygen according to the balanced chemical equation below.
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1.  (Points: 4)    2 O 3 (g) 3 O 2 (g) If the rate of disappearance of ozone is -7.2 × 10 -4 M/s, what is the rate of formation of oxygen? Paragraph  Insert equation    Save Answer     6.  (Points: 4)      What is the half-life of a first-order reaction if it takes 4.8 × 10 -3 seconds for the concentration to decrease from 1.33 M to 0.51 M? Paragraph  Insert equation    Save Answer     7.  (Points: 4)      The decay of radioactive elements is a first- order process. The half-life of carbon-14 is 5730 years. How many years will it take for 5.0 g of carbon-14 to decay to 1.0 mg? Paragraph  Insert equation 
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1.  (Points: 4)      Save Answer     8.  (Points: 4)      Which statement concerning relative rates of reaction is correct for the decomposition of phosphine? 4 PH 3 (g) P 4 (g) + 6 H 2 (g) a.  The rate of disappearance of PH 3 is 6/4 the rate of appearance of H 2 .
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This note was uploaded on 11/16/2008 for the course CHM 152 taught by Professor Thomas during the Fall '08 term at Pima CC.

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CHEM quiz 2 - 1. (Points: 4) k 1. 2. 3. Increasing the...

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