Multiple ChoiceWhich of the following reacting molecules are able to produce products the fastest?643views7rank
Multiple ChoiceA chemist tries to burn sulfur in air and notices that it burns very slowly. Chemist then burns sulfur in pure oxygen and observes a brilliant blue flame. Which factor is affecting the reaction rate?788views2rank
Multiple ChoiceThe rate law for a particular mechanism is expressed as rate = [A]2[B]. If [A] is halved and [B] is doubled, how would the overall rate be affected?280views
Multiple ChoiceIdentify the intermediate in the mechanism below: Step 1: NO2 → NO + O Step 2: O + NO2 → O2 + NO207views
Multiple ChoiceCalculate the activation energy for the reaction that has a rate constant of 0.124 s–1 at 125.0 °C and a rate constant of 0.345 at 200.0 °C.282views
Multiple ChoiceWhich of the following statements is false about the effect of temperature on the reaction rate?317views
Textbook Question(b) As the temperature increases, does the reaction rate increase or decrease?619views
Textbook QuestionIndicate whether each statement is true or false. (b) Exothermic reactions are faster than endothermic reactions.833views
Textbook QuestionMany metallic catalysts, particularly the precious-metal ones, are often deposited as very thin films on a substance of high surface area per unit mass, such as alumina 1Al2O32 or silica 1SiO22. (b) How does the surface area affect the rate of reaction?354views
Textbook QuestionConsider the reaction H21g2 + I21g2S 2 HI1g2. The reaction of a fixed amount of H2 and I2 is studied in a cylinder fitted with a movable piston. Indicate the effect of each of the following changes on the rate of the reaction. (c) The addition of a catalyst253views
Textbook QuestionConsider the reaction H21g2 + I21g2S 2 HI1g2. The reaction of a fixed amount of H2 and I2 is studied in a cylinder fitted with a movable piston. Indicate the effect of each of the following changes on the rate of the reaction. (a) An increase in temperature at constant volume283views
Textbook QuestionValues of Ea = 6.3 kJ>mol and A = 6.0 * 108>1M # s2 have been measured for the bimolecular reaction: NO1g2 + F21g2S NOF1g2 + F1g2 (d) Why does the reaction have such a low activation energy?263views
Open QuestionHow will increasing the surface area of one or more reactants affect the reaction rate of a system?174views
Open QuestionWhat two factors speed up rates of chemical reaction and weathering in rocks and soils?160views
Open QuestionWhich of the following could increase the rate of chemical weathering of a rock?137views
Open QuestionWhich of the following factors directly impacts the rate at which a liquid evaporates?132views