CHY 102 Chem Cram - Midterm 2 PDF

CHY 102- Chem Cram Midterm 2 1  Midterm 2 Info Exam Date: Friday November 8, 2024 Exam Time: 6:30 PM (EST) – 8:30 PM (EST) Exam Location: See Announcement on D2L for Exam Rooms Format: 25 Multiple Choice Questions Chapt...

CHY 102- Chem Cram Midterm 2 1  Midterm 2 Info Exam Date: Friday November 8, 2024 Exam Time: 6:30 PM (EST) – 8:30 PM (EST) Exam Location: See Announcement on D2L for Exam Rooms Format: 25 Multiple Choice Questions Chapters Questions Chapter Questions Chapter 7 – Gases 6 questions Chapter 13 - Solutions 6 questions Chapter 12 – Liquids and Solids 6 questions Chapter 14 – Chemical Kinetics 7 questions Tools Allowed: Non-programmable Calculator, Pencil, Eraser, ID Materials Provided: Formula Sheet and Periodic Table CHY 102 – General Chemistry 2  Midterm 2 Info Midterm 2 – Chapters 7, 12-14 Friday, November 8th, 6:30 pm – 8:30 pm Multiple Choice Check out D2L Interactive Examples for short videos Questions only on essential skills Check out Video Tutorials, Textbook Questions, Adaptive Assignments Past Exams available for practice Periodic Table and Formula Sheet is provided. CHY 102 – General Chemistry 3  Midterm 2 Rooms You will be assigned to a room à check your room in the student information document You must write your exam in that room. First Letter of last name Room.......... Kerr Hall East (KHE).. 4  Filling out an Akindi Sheet W2024 Bubble in your answers when you are convinced of an answer. You will not get extra time at the Bubble in the correct end of the exam to March 15 Version Number. bubble in your answers. No Version Number = 0 on the Exam Pencil is preferred to pen so you can erase Bubble in your Student and change your Number correctly answer if needed. No Student Number = 0 on the Exam CHY 102 – General Chemistry 5  Study Resources Past Midterms are available in the Midterm 2 Module Print off the Midterm 2 Formula Sheet and use it while you are solving practice problems. Interactive Examples are short video tutorials on important skills for every chapter. Check these out! Video Tutorials Textbook questions (Odd-numbered questions) Adaptive Assignments on Achieve 6  Study Tips Read the Notes You’ve Already Made! Don’t makenew ones. Quiz Yourself! Do practice problems for calculations and your notes for concepts. Practice of questions is key!!! Closer to the exam, bounce from topic to topic. Eat well, take breaks and get a good night’s sleep! CHY 102 – General Chemistry 7 How many moles of helium are found in a balloon that contains 5.5 L of helium at a pressure of 1.15 atm and a temperature of 22.0 ºC? A.3.5 B.0.26 C.2.6 D.0.35 E.3.8 The volume of O2 gas in a balloon at 1.0 atm and 305 K is 0.65 L. Calculate the volume of the gas after the temperature is lowered to 77 K while keeping the pressure and amount of O2 constant. A. 0.16 L B. 0.65 L C. 2.8 × 10–5 L D.3.6 × 104 L E. Not enough information Which of the following will have the greatest volume at STP? A. 5.0 g H2 B. 5.0 g N2 C. 5.0 g O2 D. 5.0 g CO E. All of the above have the same volume. A 3.50 g sample of a diatomic gas in a 1.5 L container has a pressure of 2.42 atm at 355 K. Determine the identity of the gas. A. H2 B. N2 C. Cl2 D. O2 E. F2 The four most common gases in the atmosphere are N2, O2, Ar, and CO2. Which gas has the highest average kinetic energy at room temperature? A. N2 B. O2 C. Ar D. CO2 E. All have the same average kinetic energy. Which of the following will have the greatest average velocity at 300 K? A. N2 B. O2 C. CO2 D. SO2 E. All have the same velocity Which type of intermolecular force is the strongest? A.Dispersion B.Dipole-dipole C.Hydrogen Bonding D.Ion-dipole A 29.0 g sample of acetone is heated from a solid at −94.8°C to −50.0°C. How much energy is required for this change? Melting −94.8°C point A. 2.80 kJ ΔHfus 5.69 kJ/mol B. 5.64 kJ Cs 2.15 J/g·K C. 6.18 kJ Molar mass 58.01 g/mol D. 2.96 kJ E. 7.84 kJ A sample is at the temperature and pressure indicated by point a on the phase diagram below. What phase is present after the temperature is increased to the critical temperature at constant pressure? A.gas B.liquid C.solid D.More than one phase is present. What phases are present at point f on the given phase diagram? A.gas and liquid B. gas and solid C. liquid and solid D.gas, liquid, and solid E. None of the above If a certain metal forms in a FCC unit cell with an edge length of 3.52 Å, what would you calculate as the radius of one atom? A.4.60 × 10–8 cm B.4.98 × 10–8 cm C.8.80 × 10–9 cm D.1.24 × 10–8 cm Why is chloroform, CHCl3, more soluble in water than is carbon tetrachloride, CCl4? A. CCl4 is nonpolar and has stronger solute–solute interactions. B. CHCl3 is polar and has stronger solute–solute interactions. C. CHCl3 is polar and has stronger solute–solvent interactions. D. CCl4 is nonpolar and has an exothermic ΔHsolute A room-temperature solution is saturated in both KCl and CO2. When the solution is heated to near boiling, which of the following is most likely to occur? A. Some KCl precipitates out of solution. B. Some CO2 bubbles out of solution. C. Some CO2 bubbles out of solution and some KCl precipitates. D.Nothing is likely to happen. A solution of ammonia is made by dissolving 35 g of NH3 in 90.0 g of H2O. The density of the solution is 0.898 g/mL. What is the molarity of NH3? A. 53 M B. 0.39 M C. 23 M D.15 M E. not possible to calculate What is the mass percent of a solution prepared from 15 g of NaCl in 45 g of H2O? A. 33% B. 25% C. 50% D.15% Lauryl alcohol, a component of coconut oil, is used to make detergents. A solution of 5.00 g of lauryl alcohol in 0.100 kg of benzene freezes at 4.1°C. What is the molar mass of lauryl alcohol? Kf(benzene) = 5.12°C/m; Tf(benzene) = 5.50°C. A. 270 g/mol B. 13.7 g/mol C. 62.4 g/mol D.46.5 g/mol E. 183 g/mol Which of the following solutions will have the largest osmotic pressure? A.0.50 M C6H12O6 B.0.50 M NaCl C.0.50 M K2SO4 D.0.50 M FeCl3 Determine the rate of disappearance of NO in the first 100 seconds. A. 3.4 × 10–4 M/s B. 5.9 × 10–4 M/s C. 4.1 × 10–4 M/s D. 1.6 × 10–4 M/s [NO] time (s) E. 2.1 × 10–4 M/s 0.100 0 0.078 50 0.059 100 0.043 150 0.031 200 H2O2 can be used as a disinfectant; it decomposes as: 2 H2O2 → 2 H2O + O2 If the rate of appearance of O2 is 0.0014 Ms–1, what is the rate of disappearance of H2O2? A.0.0014 Ms–1 B.0.00070 Ms–1 C.0.0028 Ms–1 None of the above are correct. Intro What is the value of the rate constant, k, for the reaction? 2 ClO2 (aq) + 2 OH– (aq) → ClO3– (aq) + ClO2– (aq) + H2O (l) Initial Rate [ClO2] [OH–] (M/s) A. 4.35 × 10–3 M–1s–1 0.060 0.030 0.0248 B. 13.8 M–1s–1 0.020 0.030 0.00276 C. 4.60 M–1s–1 0.020 0.090 0.00828 D. 230. M–2s–1 E. 459 M–1s–1 A reaction proceeds according to first order kinetics. If the initial concentration is 1.5 M and the rate constant is 0.0294 s–1, what is the concentration after 24.5 seconds? A. 0.48 M B. 0.29 M C. 0.075 M D. 0.32 M E. 0.73 M A zero order reaction has a rate constant of 0.28. How long will it take for the reactant to reach 30% of its original concentration of 1M? A.2.5 s B. 4.3 s C. 0.083 s D.20 s E. 1.8 s The chirping of tree crickets has sometimes been used to predict temperatures. At 25.0 °C the rate was 179 chirps/min. At 21.7 °C it was 142 chirps/min. What is the Ea of the process? A. 316 J/mol B. 51,300 J/mol C. 0.749 kJ/mol D. 6.16 kJ/mol  If You Need to Cram… No JudgingYourself!YouarestilltransitioningtoUniversity Start with banking the chapters that have the most questions Do notmake more notesorreadnewmaterial! You’vealreadytakennotesin class; summarize them and quiz yourself. Try to predict what we will test you on based on the 5/6 most important concepts/skills foreach chapter. Make sure that you have mastered those concepts/skills. You absolutely need to do the math! Remember that questions are all equally weighted; hard questions and easy questions are all worth 1 mark. Bank as many easy questions as you can. Only focus on difficult questions/topics if you have time. 3