CHEM 1040 EXAM 2 NAME SIGNATURE FALL 2024 VERSION B KEY PLEASE PRINT M NUMBER M By signing this Exam Sheet I declare that I will not share with my colleagues the content of the questions I received during this Exam I also certify that the work I did was mine I am affirming that I will not cheat and that I will uphold the Bearcat Bond This examination will cover material from Chapters 4 and 6 This Exam Sheet contains 25 Multiple Choice problems on 6 pages including this one Please count the number of pages and problems to ensure that you have a complete examination before you begin working Please make sure that the Exam Answer Sheet version and the version of this booklet are the same Please write your name as it appears on Canvas and M number without the M on the cover page of your answer sheet and be certain that all 25 of your answers are filled in on the Exam Answer Sheet Answer Multiple Choice Problem on the provided Exam Answer Sheet Only the answers marked on your Exam Answer Sheet will be scored Be sure to mark your answer clearly You are encouraged to write out your work on this exam packet You may tear off the equation sheet periodic table at the end of this exam packet You have 55 minutes to complete all problems This is a close book examination which means you cannot use lecture notes textbook recitation notes to solve problems and you have to work alone When finished please turn in your Exam Answer Sheet question booklet and scratch paper to a TA at the front of the room and show them your Bearcat card Good Luck Chem 1040 Exam 2 Version B 1 6 1 What are the major ionic species present in solution when 6 What is the total ionic equation when the following two reactants is dissolved in water A only N3 B N3 Mg2 and O2 C Mg2 and H2O D Mg2 N2 and O2 E Mg2 and NO3 react A Zn2 SO4 2 2Na 2OH Zn OH 2 2Na SO4 2 B Zn2 2OH Zn OH 2 2 Na2SO4 C 2Na SO4 D ZnSO4 aq 2NaOH Zn OH 2 Na2SO4 E SO4 2 2Na Zn2 2OH 2 2 How many total moles of ions are in an aqueous solution that has 7 What are the spectator ions in the following reaction of dissolved in water A 4 0 total moles of ions B 22 total moles of ions C 6 0 total moles of ions D 1 0 total moles of ions E 8 0 total moles of ions 3 mol ions from 1 mol salt NH4 2S 2NH4 S2 2 0 mol salt 3 mol ions 1 mol NH4 2S 6 0 mol ions A There are no spectator ions B Ba2 and CO3 C K and Cl 2 D Ba2 and Cl 2 E K and CO3 3 How many grams of are needed to make 8 What is the net ionic equation when the following two reactants of a solution A 5 51 107 g react A Na OH H Cl 1 00 L 0 689 mol 1000 mL 1 L 78 0 g 1 mol 487 mL 26 2 g B 287 g C 55 1 g D 26 2 g E 4 30 10 3 g NaH ClOH B OH H H2O C Na Cl NaCl D no reaction occurs E NaOH HCl H2O KCl 4 A chemist dilutes of a solution to a final 9 Which of the following is considered the strongest electrolyte concentration of What is the solution s final volume A 71 4 mL B 0 0140 mL C 169 mL D 0 307 mL E 7 73 mL 1 1 2 2 2 23 5 mL 4 68 M 2 1 54 M 1 1 2 71 4 mL A CH3CO2H B SiO2 C NH3 D KCl E Ne 5 Consider What is the theoretical yield in grams of if of reacts with excess 10 What was the molarity of the solution if of a solution was used to neutralize of an solution for the following balanced reaction A 114 g B 92 7 g C 834 g D 147 g E 278 g 435 mL MgSO4 1000 mL 1 L 1 00 L 2 43 mol MgSO4 1 mol Mg3PO4 3 mol MgSO4 263 g Mg3PO4 1 mol Mg3PO4 92 7 g Mg3PO4 A 2 07 M B 0 790 M C 1 58 M D 0 186 M E 0 371 M 145 mL Ba OH 2 1000 mL 1 L 1 00 L 1 28 mol Ba OH 2 2 mol HCl 1 1 mol Ba OH 2 235 mL 1 00 L 1000 mL 1 58 M HCl Chem 1040 Exam 2 Version B 2 6 11 The oxidation number of the element in is 16 For the chemical equation below the reaction is A 4 B 6 C 3 D 2 E 6 Oxidation numbers O 2 3 Na 1 2 Si 4 1 SUM 6 2 4 0 because energy is A endothermic released B isothermic conserved C endothermic absorbed D exothermic absorbed E exothermic released 12 What species is reduced in the following reaction Sn 2 Sn2 oxidized Pb2 2 Pb reduced A Pb B Sn C Sn2 D Pb2 E No species is reduced 17 Consider a system which does no work on the surroundings and no work is done by the surroundings on the system What is true about the values of and for the system if heat is absorbed by the system A is positive and is negative B no conclusion can be made C is negative and is positive D is negative and is negative E is positive and is positive 13 Which species is the reducing agent in the following reaction 18 Consider a system that absorbs of heat and does of work on the surroundings What is the of the system A nothing is the reducing agent H2 is reducing agent because H2 2 2H oxidized 139 J 754 J 615 J absorbed 0 done on the surrounding 0 A 893 J B 615 J C 893 J D 615 J E 754 J 14 The oxidation number of the element in is 19 For which from the following reactions or WILL BE Oxidation numbers O 2 3 Pt 4 1 SUM 6 4 2 approximately or exactly equal to A CH4 2O2 CO2 2H2O B I2 I2 g C N2 O2 2NO D CH3OCH3 CH3OCH3 E Na2CO3 Na2O CO2 B H2O C Ag D Ag2O E H2 A 6 B 4 C 2 D 3 E 5 15 Classify the following reaction from the choices below A precipitation B single displacement C decomposition D acid base E combination 20 Wood has a specific heat capacity of Calculate the heat absorbed in when of a wood sample is heated from to 78 38 40 40 K 550 g 1 76 40 K J g K 1 kJ 1000 J A 12 5 kJ B 75 5 kJ C 36 …