Chem 1211 Exam 1 - Summer 2022 PDF

The Smart Study Toolkit PDF, Annotate, Note Exam Cover Page Instructions: This exam consists of 25 questions and one bonus question. You have 70 minutes to complete. Directions: Fill in the following information on your scantron: o Name (Last,...

The Smart Study Toolkit PDF, Annotate, Note Exam Cover Page Instructions: This exam consists of 25 questions and one bonus question. You have 70 minutes to complete. Directions: Fill in the following information on your scantron: o Name (Last, Space, First, MI) Print and Sign your first and last name on this page acknowledging you have read the academic honesty statement. Academic Honesty Statement The student should maintain a high standard of honor in his or her academic work, and should not engage in any form of scholastic dishonesty, including but not limited to the following: PLAGIARISM, COLLUSION, CHEATING ON TESTS, AND IMPERSONATION. Cheating of any description will not be tolerated and will result in a zero on this test and will not be considered for replacement points. A second offense will result in immediate withdrawal from the course with a failing grade. The University's policy on academic dishonestly will be strictly enforced. I have read, understand and agree to the Academic Honesty Statement. __________________________________________ Date ________________ Printed Name ___________________________________________ 1 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note CHEM 1211 Spring 2022 Exam 1 Name: _____________________________________ KSU ID: ___________________________________ 2 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Question 1: Which image represents a heterogenous substance? a. b. c. d. e. None of these Question 2: What kind of change is depicted below? a. Chemical change b. Physical change c. Both chemical and physical change d. No change option e. intentionally omitted Question 3: A piece of plastic weighing 1.157 g has a volume of 1.48 cm3. A piece of wood has the same volume but weighs 3.85 g. The density of liquid X is 0.765 g/mL and the density of liquid Z is 1.13 g/mL. The two liquids do not mix in one another. If the plastic and wood are added to the two liquids, what is the order of layers from top to bottom in the container? a. liquid X, liquid Z, plastic, wood b. liquid X, plastic, liquid Z, wood c. plastic, wood, liquid Z, liquid X d. wood, liquid Z, plastic, liquid X option e. omitted on purpose 3 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Question 4: A general chemistry student found a chunk of metal in the basement of a friend's house. She measured the mass of the metal to be 383.6 g. Then she dropped the metal into a graduated cylinder containing 25.0 mL of water, and the water level rose to 43.0 mL. Of the following metals, which is the most likely: a. Aluminum, d = 2.72 g/mL b. Silver, d = 10.50 g/mL c. Lead, d = 11.34 g/mL d. Tungsten, d = 19.38 g/mL e. Platinum, d = 21.46 g/mL Question 5: A certain solid has a density of 8.0 g/cm3. If 4.0 g of this solid are poured into 4.00 mL of water, which drawing below most closely represents the volume of water after the solid is added? a. drawing (a) b. drawing (b) c. drawing (c) d. drawing (d) option E. omitted on purpose Question 6: The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. What is this distance in millimeters? a. 1.15 × 10- 8 mm b. 1.15 × 10- 7 mm c. 1.15 × 1013 mm d. 1.15 × 1017 mm Question 7: The speed of light in a vacuum is 2.998 × 108 m/s. What is this speed given in cm/min? a. 1.799 × 1013 cm/min b. 1.799 × 1012 cm/min c. 4.997 × 108 cm/min d. 1.799 × 108 cm/min e. 4.997 × 104 cm/min 4 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Question 8: How much feet (ft) is contained in 0.112 km, given that 1 mile = 1.609 km and 5280 ft = 1 mile(exact). a. 368 feet b.3.42 x 10-5 ft c.1.321 x 10-5 ft d. 953 ft e. 2.72 x 10-3 ft Question 9: Convert 21.8 in3 to liters. (2.54 cm = 1.00 in) a. 0.0554 L b. 1.33 × 103 L c. 8.58 L d. 0.357 L e. 8.58 × 103 L Question 10: Which symbol represents an atom that has 24 electrons, 26 protons, 30 neutrons? 56 a. 26𝐹𝑒 56 2- b. 26𝐹𝑒 56 2+ c. 24𝐶𝑟 𝟓𝟔 2+ d. 𝟐𝟔𝑭𝒆 86 2- e. 24𝐶𝑟 Question 11: Which of the following figures represents 15 7 N ? Unshaded spheres represent neutrons and shaded spheres represent protons. a. figure (1) b. figure (2) c. figure (3) d. figure (4) option e. omitted on purpose 5 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Question 12: In which of the following sets do all species have the same number of electrons? a. F-, Ne, Mg2+ b. Ge, Se2-, Br- c. K+, Rb+, Cs+ d. Br, Br-, Br+ option e. omitted on purpose Question 13: Which of the following is a correct feature of the nuclear atom proposed by Rutherford? a. All atoms of an element have the same mass. b. The atom is mostly empty space. c. The number of neutrons and electrons in the atom are equal. d. Most alpha particles to strike the foil "bounced back." e. It is like the "plum pudding" model. Question 14: Dalton's atomic theory is based on several assumptions, which are listed below. Which of these assumptions are still values today? I) All atoms of the same chemical element are identical. II) Atoms are indivisible and unchangeable. III) Chemical changes are the result of the combination, separation, and rearrangement of atoms. a. I, II, and III are correct. b. I and III are correct. c. II and III are correct. d. I and II are correct. e. III is correct. Question 15: Which of the following represent isotopes? A: X B: X C: X D: X a. A and B b. A and C c. A and D d. C and D option e. omitted on purpose. Question 16: Two electromagnetic waves are represented to the right. Wave (b) has the a. higher frequency and higher energy than wave (a). b. higher frequency and lower energy than wave (a). c. lower frequency and higher energy than wave (a). d. lower frequency and lower energy than wave (a). option e. omitted on purpose. 6 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Option 17: What is the wavelength in nm associated with radiation of frequency 2.8 × 1013 s-1? a. 840 nm b. 2.8 × 104 nm c. 299 nm d. 9.3 × 104 nm e. 1.1 × 104 nm Question 18: Arrange the following spectral regions in order of increasing wavelength: infrared, microwave, ultraviolet, visible. a. microwave < infrared < visible < ultraviolet b. microwave < visible < infrared < ultraviolet c. ultraviolet < infrared < visible < microwave d. ultraviolet < visible < infrared < microwave e. option e. omitted on purpose. Question 19: What is true about the electronic transition shown in the figure? The electron moves ____________ the nucleus and energy is ____________. a. closer to, absorbed b. away from, absorbed c. closer to, released d. away from, released option e intentionally omitted. Question 20: Electromagnetic radiation with the shortest wavelength will be emitted when an electron undergoes which of the following transitions? a. n = 1 → n = 2 b. n = 2 → n = 1 c. n = 2 → n = 3 d. n = 3 → n = 2 option e intentionally omitted. Question 21: What is the wavelength of the transition from n = 1 to n = 2? a. 6.992 x 10-8 nm b. 121.6 nm c. -69.92 nm d. 1.430 x 107 nm e. 1.430 x 1016 nm 7 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com  The Smart Study Toolkit PDF, Annotate, Note Question 22: Each of the following sets of quantum numbers is supposed to specify an orbital. Choose one set of quantum numbers that does not contain an error. a. n=3,l=2,ml=-3 b. n=4,l=2,ml=+4 c. n=2,l=2,ml=0 d. n=2,l=2,ml=-1 e. n=4,l=3,ml=-2 Question 23: Which set of quantum numbers is valid and correctly represents the assigned orbital? 1. (3, 1, 0); 3d 2. (2, 1, -1); 2p 3. (5, 3, +4); 5f 4. (1, 1, 0); 1s 5. (4, 2, -2); 4p Question 24: For an electron in a given atom, the larger n, the a. larger the average distance from the nucleus and the higher the orbital energy. b. larger the average distance from the nucleus and the lower the orbital energy. c. smaller the average distance from the nucleus and the higher the orbital energy. d. smaller the average distance from the nucleus and the lower the orbital energy. option e intentionally omitted. Question 25: For the fourth-shell orbital shown below, what are the principal quantum number, n, and the angular momentum quantum number, l? a. n = 4 and l = 0 b. n = 4 and l = 1 c. n = 4 and l = 2 d. n = 4 and l = 3 option e intentionally omitted. Bonus Question (26): The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm 3. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g) a.849 lb/in3 b. 491 lb/in3 c.376 lb/in3 d. 0.491 lb/in3 e. 1.83  10–3 lb/in3 8 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com The Smart Study Toolkit PDF, Annotate, Note 9 This Document has been modified with Flexcil app (iPad) | https://www.flexcil.com