a. In your own words, describe the relationship between a system and its surroundings. Use an example to illustrate your description. b. The rate constant of a first-order reaction is 4.87×10-2s-1 at a particular temperature. Calculate the half-life of this reaction. c. What are catalysts? Why are catalytic converters not very effective immediately after starting a vehicle in the winter? Suggest a way to correct this problem

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