Quiz #3 Session #1_ Chem 1LE W24

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Feb 20, 2024

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2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 1/7 Quiz #3 Session #1 Due Feb 6 at 11:59pm Points 10 Questions 8 Time Limit None Allowed Attempts 3 Instructions Attempt History Attempt Time Score LATEST Attempt 1 9 minutes 10 out of 10 Correct answers are hidden. Score for this attempt: 10 out of 10 Submitted Feb 6 at 2:40pm This attempt took 9 minutes. The information needed to answer these questions can be found in your general chemistry lecture textbook, the Lab Safety for Chemists online text (https://drive.google.com/file/d/1zGrN2CkyKk- UejhEa277V-VPzfgf-TLr/view?usp=sharing) (Section 2.1.2) and in documents hyperlinked within this document. Take the Quiz Again 2 / 2 pts Question 1 A NaOH (aq) stock solution was created by dissolving 3.88 g NaOH in water to create a 100.00 mL solution. What is the concentration of this solution? [ Select ] M Perform a ten fold dilution to create three more solutions. What are the concentrations of these solutions? Dilution #1: [ Select ] M Dilution #2: 0.0097 M
2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 2/7 Answer 1: Answer 2: Answer 3: Answer 4: Dilution #3: 0.00097 M 0.970 0.0970 0.0097 0.00097 1 / 1 pts Question 2 Why is significant? max The value indicates the amount of light absorbed. The value can indicate the observed color of solution. The value increases as the energy of light increases. The instrument response is highest at that wavelength. The value is can be used to identify a particular chemical. 2 / 2 pts Question 3 Fill in the table with the correct responses. Reaction Order Integrated Rate Law Linear Plot Rate constant Half life
2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 3/7 (k) from the linear plot (t ) zero [a] [b] [c] [d] first [e] [f] [g] [h] second [i] [j] [k] [l] Answer bank: 1. 1/A = kt + 1/A 2. ln A vs time 3. negative of the slope (-m) 4. log A vs time 5. A = -kt + A 6. A /k 7. A /2k 8. y-intercept 9. A vs time 10. slope (m) 11. A = kt + A 12. 1/A vs t 13. lnA = -kt + lnA 14. ln2/k 15. 1/kA 1/2 t o t o t o t o t o o a 5 b 9 c 3
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2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 4/7 d 7 e 13 f 2 g 3 h 14 i 1 j 12 k 10 l 15 1 / 1 pts Question 4 The following plot (https://canvas.eee.uci.edu/courses/59678/files/24522285/download? download_frd=1) is from a kinetics run of crystal violet and sodium hydroxide.
2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 5/7 Which of the following is the pseudo rate law for the reaction? A. Rate = k[CV ][ OH] B. Rate = k C. Rate = k [CV ] D. Rate = k[CV ] E. Rate = k[CV ][ OH] + - 1 1 + + 2 + - 2 D B E A C 1 / 1 pts Question 5 In the Fundamental Skills section of this experiment, you will be instructed combine the reaction mixture, place it into a cuvette and immediately place it into the spectrometer. The light source in the spectrometer is warms the solution inserted into its beam. Warming the solution will change the
2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 6/7 (Multiple answers are possible.) color of the final solution slope of the linear plot from the integrated rate law type of reaction occurring reaction order rate constant, k 1 / 1 pts Question 6 Match Fire Class with the fuel for the fire. A paper, clothing, plastic B gasoline, oil, organic s C hot plates, computers D reactive metals (sodium 1 / 1 pts Question 7 Which of the following statements are true about fire? More than 1 answer can be correct.
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2024/2/6 14:40 Quiz #3 Session #1: Chem 1LE W24 https://canvas.eee.uci.edu/courses/59678/quizzes/300102 7/7 Removing heat keeps the fuel from vaporizing. Fires are classified by what type of oxidizing agents are involved. The fuel must be vaporized to burn. Water cannot be used to extinguish a class D fire. Water can be used to extinguish a class B fire. 1 / 1 pts Question 8 Look up information about bleach, NaOCl(aq). Which of the following are true statements? Bleach forms poisonous chlorine & chloramine gas when combine with ammonia If a significant amount of bleach is spilled on you, get into the safety shower. Bleach can cause severe skin burns and eye damage. Nitrile gloves are have a 480 min breakthrough time for bleach. Bleach is a weak reducing agent. Quiz Score: 10 out of 10