25 Half life is the time required for one half of the sample to react 26 An

25 half life is the time required for one half of the

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____ 25. Half-life is the time required for one halfof the sample to react. _____________________________ 26. An ineffective collisionis one that has sufficient energy and correct orientation so that the reaction can proceed. _____________________________ 27. The activation energy is themaximumamount of energy with which particles must collide to result in an effective collision. _____________________________ 28. The activated complex in an unstable chemical species containing partially broken and partially formed bonds. __________________________________ 29. The activated complex represents the minimum potential energyin the reaction process. _______________________________________ 30. The first step in a reaction mechanism is known as the rate-determining step. _____________________________ 31. A catalyst can be used as part of a reaction mechanism, perhaps involved in forming a reaction intermediate. _________________________Multiple ChoiceIdentify the choice that best completes the statement or answers the question.____ 32. A rate of reaction is usually obtained bymeasuring a. the rate at which products are consumed b. the rate at which reactants are produced c. the rate at which reactants are consumed d. the temperature of the solution e. the mass and volume of the products ____ 33. The following property can be measured to determine the rate of the reaction ____ 34. In the reaction, , if the concentration changes from 0.45 mol/L to 1.00 mol/L in 2 minutes, what is the overall rate of production of nitrogen dioxide in the system? ____ 35. What is the overall rate of change in the combustion reaction of propane if the initial volume of propane is 5.0 L and after 20 minutes of burning is 3.6 L?
____ 36. What is the average rate of production of carbon dioxide for the system between 2.0 and 4.0 minutes, , if the concentration of carbon dioxide is 2.5 mol/L after 2.0 minutes and 7.2 mol/L after 4.0 minutes? a. 0.426 mol/(L·min) d. 2.35 mol/(L·min) b. 1.18 mol/(L·min) e. 42.6 mol/(L·min) c. 0.952 mol/(L·min) ____ 37. What is the average rate of production of in the reaction of zinc with hydrochloric acid if after 30 s the volume of hydrogen is 20 mL, and after 1 minute, the volume is 62 mL? ____ 38. Within a reaction with 2 reactants and 2 products, the reaction rate can be measured with respect to

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