American Public University CHEM 233/ CHEM233 Lesson 1 Quiz_ Answered Latest 2025/26.

American Public University CHEM 233/ CHEM233 Lesson 1 Quiz_ Answered Latest 2025/26. Lesson 1 Quiz - Results Attempt 1 of 1 Written Mar 17, 2025 8:24 PM - Mar 17, 2025 8:49 PM Released Mar 21, 2025 11:55 PM Attempt Score 56 / 100 - 56 % Overall Grade (Highest Attempt) 56 / 100 - 56 % Question 1 4 / 4 points Which of the following electron configurations represents the electron configuration for a magnesium cation? Question options: 1s22s22p63s23p2 1s22s22p6 1s22s22p4 1s22s22p63s2 None of the choices are correct. Question 2 0 / 4 points Which of the following is the Lewis structure for carbon dioxide? Question options:None of the choices are correct. Question 3 0 / 4 points What are the hybridization of carbons 1 and 2 respectively in cyclopentene? Question options: sp2 and sp2 sp2 and sp3 None of the choices are 3 and sp sp3 and sp2 Question 4 0 / 4 points What is the hybridization of carbon atom E in Cinnamoside? Question options: sp2 unhybridizedsp3 sp Question 5 4 / 4 points What is the hybridization of carbon atom J in timolol? Question options: sp sp2sp3 unhybridized sp3d Question 6 0 / 4 points What is the hybridization of sulfur atom B in timolol? Question options: sp2unhybridized sp3d sp3 sp Question 7 4 / 4 points The molecular orbital diagram for the carbide anion (C22-) would have which of the following molecular orbital configurations? Question options: (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(π2p)4(σ2p)2 (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(π2p)4 (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(π2p)4(σ2p)2(π*2p)4 (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(π2p)4(σ2p)2(π*2p)2 Question 8 4 / 4 points Which of the following orbital diagrams represents the silicon atom? Question options:More than one of the choices is correct.Question 9 0 / 4 points How many lone pairs of electrons will be present in the following molecule? CH3–N=N=N Question options: 4 0 3 1 2 Question 10 4 / 4 pointsWhat do fluorine atoms tend to do when they form chemical compounds with metals? Question options: None of the answers are correct. gain electrons lose electrons fluorine atoms do not form compounds with other atoms. they usually share electrons equally with metals. Question 11 0 / 4 points What is the total number of σ bonds found in the following compound? Question options: 15 22 118 10 Question 12 4 / 4 points What is the best estimate of the magnitude of the bond angle around atom D in Cinnamoside? Question options: 109.5o 180o104.5o 120o 107.3o Question 13 4 / 4 points Identify the term for any species that can accept electrons. Question options: Electronegativity Lewis Acid Brønsted-Lowry Acid Brønsted-Lowry Base Lewis Base Question 14 4 / 4 points What are the orbitals of the reactants which interact in the Lewis acid-base reaction between BH3 and H2O? Question options:an empty p orbital on boron and a non-bonding lone pair on oxygen. a filled σ orbital on boron and an empty σ* orbital on oxygen. an empty sp3 orbital on boron and a non-bonding long pair on oxygen. an empty s orbital on the hydrogen and a filled σ orbital on boron. Question 15 0 / 4 points Which of the following representations are resonance structures? Question options: and Question 0 / 416 points What is the formal charge of carbon atom J in timolol? Question options: -2 0 +2 -1 +1Question 17 4 / 4 points The following is generic depiction of a reaction using the curved arrow notation. Which of these statements is not correct for this reaction? Question options: Electrons move from C to B. Electrons move from B to A. In the products, a bond forms between C and B. None are correct. In the products, A would have a positive charge. Question 18 4 / 4 points Identify the term for the ability of an atom to attract the shared electrons in a covalent bond. Question options: Lewis BaseElectronegativity Brønsted-Lowry Base Brønsted-Lowry Acid Lewis Acid Question 19 0 / 4 points What is the formal charge of sulfur atom B in timolol? Question options:-1 +1 0 +2 -2 Question 20 4 / 4 points Which of the following statements is not true for ethylene? Question options: C=C bond length is shorter than the C-C length in ethane. The entire molecule has a planar geometry. Both carbons are sp2 hybridized. The two bonds in C=C are equally strong.The molecule has a dipole moment of zero. Question 21 4 / 4 points Which of the following would represent the strongest acid? Question options: Ka = 2.5 x 10-1 pKa = 4.60 pKa = 14.5 Ka = 2.5 x 10-5 Question 22 0 / 4 points Identify the term for a compound that can accept a proton. Question options: Lewis Acid Lewis Base ElectronegativityBrønsted-Lowry Acid Brønsted-Lowry Base Question 23 0 / 4 points Identify the term for a compound that can donate a proton. Question options: Lewis Acid Electronegativity Brønsted-Lowry Base Brønsted-Lowry Acid Lewis Base Question 24 4 / 4 points How many resonance forms can be drawn for the NO3– ion? Question options: 41 3 The nitrate ion does not exhibit resonance. 2 Question 25 4 / 4 points Which molecule is the Lewis acid, considering the following mechanism? Question options: A B Neither is a Lewis acid.Both are Lewis acids.