Deline Chem 220 CC#3  5 points  Name ________________________________ Sec ___

Put your answer on the line and attach your work to the content check.

Question 1

A)    A plot of ln[R] vs. time gives a straight line with a slope of  - 7.9E-4 s^-1. What is the rate law?

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B)     What is the concentration after 1.5 days when the initial concentration is 4.00 M and k = 5.11E-4 days^-1 ?

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C)    How many minutes will it take for 65% of the reactant to react? k = 8.00E-3min^-1

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D)    How long will it take for a reaction to go from 0.456 M to 0.123M, when the rate constant equals 4.68E-3 s^-1 ?

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Question 2

A)    What are the two requirements for a successful collision to occur?

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B)     If E_a = 77 kJ/mol, what is the new temperature required to triple the rate if the old temperature is 20.0 ⁰C ?