Straighterline CHEM101 General Chemistry I Graded Exam 4 (New Version June 2024)

Question 1 Correct 5.00 points out of 5.00 According to which scientific law does the entropy of the universe increase in spontaneous processes and remain unchanged in equilibrium processes? Select one: A. 1st universal law B. 1st law of entropy C. 2nd law of thermodynamics D. 3rd law of thermodynamics E. 1st law of thermodynamics Straighterline CHEM101 General Chemistry I Graded Exam 4 (New Version June 2024) We are a team of experts offering class attendance for all Straighterline, Online ATI, HESI, NCLEX, Portage Learning, Sophia etc courses (including final proctored exams!!). We also write essays, discussion posts, research papers and school assignments. Should you need any of these services, Contact us via email: or : +1 (540) 753-5914. Guaranteed Passing! CHEM101_MH_V6 | Topic 18: Organic Chemistry Started on State Finished Completed on Time taken 47 mins 20 secs GradeQuestion 3 Correct 5.00 points out of 5.00 The heat of vaporization of 1-pentanol is 55.5 kJ/mol, and its entropy of vaporization is . What is the approximate boiling point of 1-pentanol? Select one: A. 0°C B. 100°C C. 375°C D. 25°C Question 2 Correct 5.00 points out of 5.00 What is ΔS° for the following reaction? 4Cr(s) + 3O2(g) → 2Cr2O3(s) Substance S° (J/K • mol) Cr(s) 23.77 O2(g) 205.138 Cr2O3(s) 80.65 Select one: A. –549.19 J/K • mol B. +66.22 J/K • mol C. +148.26 J/K • mol D. +871.80 J/K • mol E. –148.26 J/K • molThe temperature at which the following process reaches equilibrium at 1.0 atm is the normal melting point for phosphoric acid. H3PO4(s) H3PO4(l) Use the following thermodynamic data at 298 K to estimate this temperature. A. 315 K B. 3170 K C. 347 K D. 305 K E. 286 K Question 5 Correct 5.00 points out of 5.00 Which of the following results in a decrease in the entropy of the system? Select one: A. NH3(l), –34.5°C → NH3(g), –34.5°C B. 2H2O2(g) → 2H2O(g) + O2(g) C. N2(g), 25°C → N2(aq), 25°C D. H2O(s), 0°C → H2O(l), 0°C E. O2(g), 300 K → O2(g), 400 K Substance: H3PO4(s) H3PO4(l) ΔH°f (kJ/mol): –1284.4 –1271.7 ΔG°f (kJ/mol): –1124.3 –1123.6 S°(J/K • mol): Select one: 110.5 150.8 Question 4 Correct 5.00 points out of 5.00Question 7 Correct 5.00 points out of 5.00 Identify the missing species in the following nuclear transmutation. U-238 + ? → 1 neutron + Fm-249 Select one: A. Al B. Al C. Li D. O E. O Question 6 Correct 5.00 points out of 5.00 Consider the figure below which shows ΔG° for a chemical process plotted against absolute temperature. From this plot, it is reasonable to conclude that: Select one: A. B. C. D. E. None of these choices is correct.Question 9 Incorrect 0.00 points out of 5.00 What other particle is emitted when a neutron is converted to a proton in a nucleus? Select one: A. Beta particle B. Alpha particle C. Positron D. Gamma particle E. None of the answers is correct. Question 8 Incorrect 0.00 points out of 5.00 A mass of 6.02 × 1026 amu is equivalent to Select one: A. 1 g. B. 1 kg. C. 1 mol. D. 1 mg. E. 1 J.Question 11 Correct 5.00 points out of 5.00 Which of the following is used to image the liver? Select one: A. 131I B. 123I C. 99Tc D. 24Na E. 18O Question 10 Incorrect 0.00 points out of 5.00 In the following diagrams, A represents a radioactive isotope that decays into a new isotope, X. Each circle represents 1 mmol of atoms. t = 0: t = 25.0 s: Over the first 25.0 s, what is the disintegration rate of A? Select one: A. 7.23 × 1019 disintegrations per second B. 1.38 × 10–20 disintegrations per second C. 3.00 disintegrations per second D. 0.120 disintegrations per second E. 1.81 × 1021 disintegrations per secondQuestion 13 Correct 5.00 points out of 5.00 How many 4d electrons does a ground-state Cd2+ ion have? Select one: A. 7 B. 2 C. 9 D. 10 E. 8 Question 14 Correct 5.00 points out of 5.00 Which of the following ligands has two different types of donor atoms? Select one: A. NH4+ B. H2O C. NH3 D. NO2– E. ethylenediamine Question 12 Correct 5.00 points out of 5.00 What is the energy equivalent of 1 amu? (c = 2. × 108 m/s) Select one: A. 6.6 × 109 J B. 5.4 × 1043 J C. 1.5 × 10–10 J D. 5.0 × 10–19 JQuestion 16 Correct 5.00 points out of 5.00 In the complex ion [Fe(CN)6]4–, what is the oxidation number of Fe? Select one: A. +1 B. –4 C. +3 D. +6 E. +2 Question 17 Correct 5.00 points out of 5.00 What is the coordination number of cobalt in the complex ion [Co(en)Cl4]–? (en = ethylenediamine) Select one: A. 6 B. 2 C. 8 D. 1 E. 4 Question 15 Correct 5.00 points out of 5.00 Which of these square planar complex ions can have cis-trans isomers? Select one: A. [Pt(NH3)Cl3]– B. [Pt(NH3)4]2+ C. [Ni(NH3)4]2+ D. [Ni(NH3)3Cl]+ E. [Pt(NH3)2Cl2]Question 19 Correct 5.00 points out of 5.00 What is the systematic name for Cr(CO)3(NH3)3? Select one: A. triamminechromium carbonate B. chromiumtriaminotricarbonyl C. triamminetricarbonylchromate(0) D. tris(amino)tris(carbonyl)chromium E. triamminetricarbonylchromium(0) Question 20 Correct 5.00 points out of 5.00 Silicon carbide is an important industrial chemical. Which of the following statements about silicon carbide is true? Select one: A. It is the hardest known substance. B. It is used for cutting, grinding, and polishing metals and glasses. C. It is used in the preparation of glass which can be used at high temperature. D. It is a naturally occurring mineral source of silicon. E. It will react with water to form acetylene. Question 18 Correct 5.00 points out of 5.00 In the complex ion [Co(en)2Br2]+, what is the oxidation number of Co? Select one: A. +3 B. –1 C. +2 D. –2 E. +1Question 22 Incorrect 0.00 points out of 5.00 What is the formal charge on the iodine atom in the iodate ion, IO3–? Select one: A. –1 B. +2 C. +1 D. –2 E. 0 Question 23 Correct 5.00 points out of 5.00 What is the formal charge on sulfur in the best Lewis structure for the SCN–? Select one: A. –2 B. 0 C. –1 D. +1 E. +2 Question 21 Correct 5.00 points out of 5.00 Which of these compounds is most likely to be covalent? Select one: A. NF3 B. CaO C. Sr(NO3)2 D. LiF E. CsOHQuestion 25 Correct 5.00 points out of 5.00 What is the general electron configuration for atoms of all elements in Group 5A? Select one: A. ns2np3 B. ns2np4 C. ns2np5 D. ns2np1 E. ns2np6 Quiz navigation 1 2 3 4 5 6 7 8 9 10 Show one page at a time Finish review Question 24 Correct 5.00 points out of 5.00 In their elemental forms, the halogens are Select one: A. strong bases. B. strong reducing agents. C. strong oxidizing agents. D. amphoteric. E. strong acids.© 2023 StraighterLine. All rights reserved