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NES General Science: Chemical Reactions Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1.

Consider the reaction:

Mg +CuCl2 = MgCl2 + Cu

Which type of reaction is shown above?

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Question 2 2. Which of the following is a double-replacement reaction?

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Question 3 3. How is reaction rate measured?

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Question 4 4. Suppose you were teaching a science class to middle school students. Because you want to show them an impressive chemical reaction, you decide to dissolve zinc in hydrochloric acid. You add more acid than usual and throw in pieces of zinc. What factor is not going to impact the reaction rate?

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Question 5 5. What is the frequency factor?

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Page 2

Question 6 6. If the exponential factor is close to 1, what is known about the activation energy and temperature?

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Question 7 7. Calculate the value of the equilibrium constant, K, for the system below, if 0.0954 moles of CO2, 0.0454 moles of H2, 0.0046 moles of CO, and 0.0046 moles of H2O vapor were present in a 1.00 L reaction vessel at equilibrium.

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Question 8 8. What is chemical equilibrium?

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Question 9 9. What is a catalyst?

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Question 10 10. What is an activated complex?

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Question 11 11. Reactants are

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Question 12 12. Which of the following is a chemical reaction?

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Question 13 13. If a scientist induces a chemical reaction, and finds that the reactants and products exist in a single phase, then what did the scientist observe?

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Question 14 14. What is a reaction mechanism?

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Question 15 15. What is formed from a neutralization reaction?

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Question 16 16. Donna noticed that as she was creating a solution, an acid was formed when a base gained a proton. Which of the following is Donna noticing?

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Question 17 17. If a scientist is trying to determine the reaction order for a given reaction, then what's the most effective means to figure it out?

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Question 18 18. What does the k stand for in the rate law equation?

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Question 19 19. When the reaction quotient is greater than the equilibrium constant, in which direction will the reaction proceed?

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Question 20 20. Only species in the _____ state are included in the equilibrium constant calculations. _____ are omitted.

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Question 21 21. What will be the result if heat is added to an endothermic reaction?

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Question 22 22. Which of the following statements best describes Le Chatelier's Principle?

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Question 23 23. An endothermic reaction is:

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Question 24 24. What does it mean when the enthalpy change for a reaction is negative?

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Question 25 25. Identify which general equation is a combination reaction.

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Question 26 26. What does an increase in temperature do to the reaction rate?

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Question 27 27. How does an increase in temperature affect the rate of a reaction?

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Question 28 28. An example of a reversible reaction is shown by which of the following?

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Question 29 29. If we know that manganese dioxide is a catalyst in the decomposition of hydrogen peroxide, then how does manganese dioxide affect this reaction?

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Question 30 30. Freezing liquid water is an example of

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NES General Science: Chemical Reactions Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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