CHEM 102

CHEM 102 Winter 18 Exam 3 (B) Questions and Answers Potentially useful data: x  2 a 1. Please choose the letter “B” as your answer for this question. 2. Consider the following endothermic chemical equilibrium. What change below would cause an increase in the I2 (g) concentration? 2 NOI (g) ⇌ 2 NO (g) + I2 (g) a) decreasing the temperature b) adding more NO c) increasing the pressure d) adding more NOI e) All of the above. 3. At 25 oC, an aqueous solution has [H3O+]...

CHEM 102 WINTER 16 PRACTICE FINAL EXAM (C) KEY 1. What is true about cytosine? Choose ALL true statements. A. All of the nitrogen atoms are sp3 hybridized. B. The bond angle around all carbon atoms are around 120°. C. Cytosine can potentially make up to 8 hydrogen bonds. D. All of the carbon atoms are sp2 hybridized. E. There are a total of 3 pi bonds in this molecule. 2. Rank the following diatomic molecules/ions in terms of decreasing stability. Please choose a SINGLE answ...

CHEM 102 Winter 18 Exam 3 (C) Questions and Answers Potentially useful data: x  2 a 1. Please choose the letter “C” as your answer for this question. 2. Consider the following endothermic chemical equilibrium. What change below would cause an increase in the I2 (g) concentration? 2 NOI (g) ⇌ 2 NO (g) + I2 (g) a) adding more NOI b) adding more NO c) decreasing the temperature d) increasing the pressure e) All of the above. 3. At 25 oC, an aqueous solution has [H3O+...

CHEM 102 Winter 07 Final Exam Questions and Answers Potentially useful information: x  pH  pKa 2 a  log base acid  ΔG° = ΔH° - T ΔS° ΔG = ΔG° + RT ln Q E  E  R T ln Q n F R = 8.314 J mol-1 K-1 F = 96480 C/mol e- 1. Volatility of a liquid increases as temperature increases because a. the molecules of the liquid decompose into lighter molecules. b. an equilibrium between liquid and vapor is established. c. the number of molecul...

CHEM 102 Winter 19 Final Exam (A) Questions and Answers Potentially useful data: x  1 atm = 760 torr = 760 mm Hg 2 a [A]t = – kt + [A]o ∆G° = ∆H° – T ∆S° ln[A]t = – kt + ln[A]o ∆G = ∆G° + RT ln Q 1/[A]t = kt +1/[A]o ∆G° = – RT ln K First order half-life: t1/2 = ln2 / k ∆G° = – nFE° pH  pKa  log base acid  E  E  R T ln Q n F R = 8.314 J mol-1 K-1 F = 96500 C/mol e- 1. Please choose the letter “A” as you...

Instructions: CHEM 102 General Chemistry I Spring 2015 Exam 3 -­‐ Version A Questions and Answers 1. Do NOT open this exam until you are told to do so. Opening the exam before the start of the exam is considered an act of Academic Dishonesty. 2. All answers must be bubbled into the scantron answer sheet. 3. No credit will be given for answers written on this exam. 4. You must use a #2 pencil to bubble in the answers on your scantron. 5. This is a multiple choice exam consistin...

CUNY Hunter College :CHEM 102: General Chemistry I Exam Final Exam Version A and B Instructions: 1. Do NOT open this exam until you are told to do so. Opening the exam before the start of the exam is considered an act of Academic Dishonesty. 2. All answers must be bubbled into the scantron answer sheet. 3. No credit will be given for answers written on this exam. 4. You must use a #2 pencil to bubble in the answers on your scantron. 5. This is a multiple-­‐choice exam cons...

CHEM 102 Winter 12 Make-Up Exam (A) Questions and Answers Potentially useful information: x  pH  pKa 2 a  log base acid  ΔG° = ΔH° - T ΔS° ΔG = ΔG° + RT ln Q ΔG° = - RT ln K R = 8.314 J mol-1 K-1 1. Please choose the letter “a” as your answer for this question. 2. A buffer solution a. contains more than the expected amount of solute for a particular temperature and is therefore unstable. b. contains the maximum amount of sol...

CHEM 102 Winter 12 Exam 2 (A) Questions and Answers Potentially useful information: First order half-life: t1/2 = ln2 / k [A]t = - kt + [A]o ln[A]t = - kt + ln[A]o 1/[A]t = kt +1/[A]o 1. Please choose the letter “a” as your answer for this question. 2. Which choice is an example of an amorphous solid? a. NaCl b. graphite c. iron d. diamond e. glass 3. Which choice is an example of an ionic solid? a. NaCl b. diamond c. iron d. quartz e. glass 4. In body-centered cubi...

CHEM 102 – Winter 18 Exam 2 Review Practice Problems 1) Which substance in the reaction below either appears or disappears the slowest? C2H4(g) + 3 O2(g)