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- 9. What effect does a catalyst have on a reaction? A. It changes the AH of a reaction. B. It increases the kinetic energy of the reactants. C. It decreases the potential energy of the products. D. It provides a reaction mechanism with a lower activation energy. 10. What does an additional catalyst to a reaction provide? A, lower activation energy and lower reaction rate. B. lower activation energy and higher reaction rate. C. higher activation energy and lower reaction rate. D. higher activation energy and higher reaction rate. 11 Which of the follouriYour answers are saved automatically * Question Completion Status: L A Moving to another question will save this response. Question 4 Which of the following would react most rapidly? a. A lump of Zn in 1.0 M HCI at 40° C Ob. Powdered Zn in 2.0 M HCI at 40° C Oc. lump of Zn in 2.0 M HCI at 25° C Od. Powdered Zn in 1.0 M HCI at 25° C L A Moving to another question will save this response.Look at the following reaction energy diagram. Energy Reaction progress a. Is AG° for the reaction positive or negative? b. How many steps are involved in the reaction? c. Which step is the slowest? (Number steps starting on the left.) | d. How many transition states are there?
- The reaction diagram shown represents which type of reaction? Reaction Coordinate One-step, fast, exergonic a. One-step, fast, endergonic b. Two-step, fast, endergonic C. Two-step, slow, exergonic d. One-step, slow, exergonic е. EnergyWhich reaction will be the fastest? ОНС. OHC. A: ОНС. ОНС. B: ОНС ОНС МеO. MeO С: Me Me D: ОНС. ОНС. E: ОНС ОНСLabel each statement as true or false. Correct any false statement to make it true.a. Increasing temperature increases reaction rate.b. If a reaction is fast, it has a large rate constant.c. A fast reaction has a large negative ?G° value.d. When Ea is large, the rate constant k is also large.e. Fast reactions have equilibrium constants > 1.f. Increasing the concentration of a reactant always increases the rate of a reaction.
- Consider the exothermic combustion of coal. Which of the following could increase the rate of reaction? A. using smaller pieces of coal B. increasing the concentration of oxygen C. lowering the temperature D. both A and B are correct E. choices A, B, and C are all correct E C B.What is the total number of moles of O₂ produced when 8 moles of H₂O decompose in this reaction? 2 H₂0→2 H₂ + O₂ A. 1 mole OB. 2 moles DC. 4 moles OD. 8 moles Q Search lyr (B53. What is an intermediate in this reaction? HO H20 a d. HO HO H. H. H. H. HO LOH
- Peter Vollhardt and Neil Schore presented by Macmillan Learnin Consider the reaction shown, then determine whether (a) each species is a Brønsted acid or base. (b) Indicate whether equilibrium lies to the left or to the right. (c) Then estimate the equilibrium constant, K. H,O + HCN = H,0+ + ¯CN a. Identify each species as a Brønsted acid or base. Select the correct assignments. H,O is the base and HCN is the acid. H,0* is the acid and -CN is the base. H,O is the acid and HCN is the base. H,0* is the base and -CN is the acid. b. Which direction does equilibrium lie? O Equilibrium lies to the right. Equilibrium lies to the left. Use the data to estimate the Keg of the forward reaction. ? Ka pKaConsider the reaction energy diagram shown below. The reaction shown is reversible, it can proceed from reagents-> products or produCts->reagents. In which direction do you think the reaction has a higher rate constant, k? reactants Reaction pregresk O a. both k's are the same. b. reactants-> products has the higher k. C. reactants to products always has the larger k d. products -> reactants has the higher k. Posential cncrgyIndicate which factors affect the rate of a reaction. a.ΔGo b.ΔHo c. Ea d.temperature e. concentration f. keq g.k h.catalysts