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TAMU CHEM 119 - Clicker Questions

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Clicker Questions Chem 119 (Bethel) 2019 Exam 1: 1) Does an electron transition from the 1st energy level to the 3rd energy level require more, less, or the same energy as a transition from the 3rd energy level to the 5th? a. 1->3 requires more energy than 3->5 b. 1->3 requires less energy than 3->5 c. 1-?3 requires the same energy as 3->5 d. There is no way to know the answer to this question 2) Which one of the following represents an acceptable set of quantum numbers for an orbital? (written out in the order: n, l, m) a. 2,2,-1 b. 1,0,1 c. 3,2,-2 d. 5,4,-5 e. 3,-2,0 3) Which one of the following represents an acceptable set of quantum numbers for an orbital? (written out in the order: n, l, ml, ms) a. 1,2,0, ±1/2 b. 2,0,1, -1/2 c. 3.2.-2. 3/2 d. 5,4,3,-3/2 e. 4,2,0, ½ 4) Which one of the following represents a correct order of orbital energies from lowest to highest? a. 2s, 2p, 2d b. 4s, 3d, 4p c. 3s, 2s, 1s d. 4p, 4d, 5s e. 3s,4s,3p 5) Which type of orbital has 3 radical and 1 angular nodes? a. 6d b. 4p c. 4d d. 3d e. 5p Answers: A, C, E, B, E Exam 2: 1) Which is the most likely ion charge? a. C + b. O 3-c. Mg 2+ d. S + e. Na 3+ 2) Which one of the following is the correct electron configuration for manganese (III)? (22 electrons) a. 1s 2s 2p 3s 3p 4s 3d b. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^4 c. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^4 3d^0 d. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^0 3d^2 e. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2 3) What is the formula of Nickel (II) Hydroxide a. Ni2(OH) b. Ni(OH)2 c. Ni2H2 d. Ni2H e. NiH2 4) What is the name of Fe(CN)3 a. Iron (III) Carbonate b. Iron Carbonate c. Iron Carbonate (III) d. Iron Cyanide (III) e. Iron (III) Cyanide 5) What is the name of PI3? a. Triiodine phosphide b. Phosphorus triiodite c. Monophosphide triiodine d. Phosphorous triiodide e. Monophosphorus tetraiodite 6) Which of the following ions is phosphide? a. P 3- b. PO 3- c. PO2 3- d. PO3 3- e. PO4 3- 7) What is the molecular geometry of CHF3? a. Trigonal bipyramidal b. Tetrahedral c. T-shaped d. Square pyramidal e. Square planar 8) What is the molecular geometry of IBr5? a. Trigonal bipyramidal b. Tetrahedralc. T-shaped d. Square pyramidal e. Square planar 9) How many electrons domains does the trigonal pyramidal molecular geometry contain? a. 2 b. 3 c. 4 d. 5 e. 6 10) What hybridization of the selenium atom of SeBr4? a. Sp3d b. Sp3d2 c. Sp d. Sp2 e. Sp3 11) What is the name of ClO-? a. Chlorate b. Chloride c. Chlorite d. Hypochlorite e. Perchlorate 12) Balance this reaction. What is the coefficient for Al? Al2O3 (aq) -> Al (s) + O2 (g) a. 1 b. 2 c. 3 d. 4 e. 5 13) Balance this reaction. What is the coefficient for O2? C3H8 + O2 -> CO2 + H2O a. 1 b. 3 c. 5 d. 7 e. 8 14) What hybridization of ozone (O3)? a. Sp3d b. Sp3d2 c. Sp d. Sp2 e. Sp3 15) What is the name of CO3 2-? a. Carboniteb. Carbonate c. Carbonide d. Oxalate e. Oxalate 16) What is the limiting reagent in a reaction of 2.00 g H2 and 30.0 g of O2? a. H2 b. O2 c. H2O d. There is no limiting reagent e. Both are limiting reagent 17) 68.5 g CO (g) with 8.60 (g) H2 to produce 35.7 g CH3OH. What is the % yield? a. 52.2% b. 78.4% c. 68.4% d. 45.6% e. 26.1% 18) A triple bond is ________ than a double bond; a double bond is _______ than a single bond a. Longer; weaker b. Shorter; weaker c. Shorter; stronger d. Longer; stronger e. None of the above 19) The high explosive, TATB, is 28.91% C, 2.343% H, 32.56% N, and 37.19 % O. What is the empirical formula? a. C28H2N33O37 b. CHNO c. C2H3N2O3 d. CH2N2O2 e. C3HN4O Answers: C, B, B, E, D, A, B, D, C, A, D, D, C, D, B, A, A, C, B,*(there’s a mess up somewhere in key) Exam3: 1) Which of these is soluble in water? a. MgS b. BaSO4 c. NH4F d. Pb(OH)2 e. AgCl 2) Which of these is insoluble in water? a. NaFb. Ba(NO3)2 c. NH4Cl d. KClO4 e. PbCl2 3) Which of the following is a strong acid or strong base? a. HC2H3O2 b. HClO4 c. NH3 d. HF e. CH3COOH 4) Which is not a strong acid or base? a. Ba(OH)2 b. Na(OH) c. HI d. HClO e. HNO3 5) Which oxidation state is correct for the following? P4(s) -+ 6Cl2(g) -> 4PCl3(s) a. P from P4 is 2+ b. P from P4 is -2 c. Cl from Cl2 is -1 d. P from PCl3 is +3 e. Cl from PCL3 is O 6) What is the concentration of Cl in a solution containing 13.0 g NaCl in 2.50 L H2O? a. .089 M b. 8.90x10^-2 M c. .222M d. .56M e. 5.56x10^-1 M 7) What is the mass of the precipate when 100.0 mL of .500 M lead(II) nitrate is added to 150.0 mL of .350 M potassium iodide? a. 24.3 g b. 23.1 g c. 16.7 g d. 12.1 g e. 8.77 g 8) What is the oxidation number of the sulfur in SO2? a. +4 b. +2 c. 0 d. -2 e. -4 9) What is the pOH of a solution containing 10 g of NaOH in .500L H2O?a. -.30 b. .25 c. .30 d. .50 e. 14 10) How much energy (as heat) is required to raise the temperature of 100.0 g of H2 by 25.0 c? a. 1.05 J b. 10.5 J c. 125 kJ d. 189 kJ specific heat capacity of H2O: 4.184 J/g K e. 2.25x10^3 kJ molar heat capacity of H2O: 75.4 J/mol K 11) A 72.3 g block of bronze (C=.380 J/g c) at a temperature of 9109 c is dropped into 136 g of H2O. The temperature of the water increased to 50.5 c. What was the initial temperature of the water? a. 33.9 c b. 52.5 c c. 24.3 c d. 48.5 c e. 45.1 c specific heat capacity of H2O: 4.184 J/g k 12) What is the change in heat when 25.0 g H2O is cooled from 20.0 c to -60 c? a. -4.18 kJ specific heat capacity of H2O(s): 2.06 J/g k b. -5.18 kJ specific heat capacity of H2O(l): 4.184 J/g k c. -8.37 kJ specific heat capacity of H2O(g): 1.86 J/g k d. -13.5 kJ Heat of Fusion of H2O: 333 J/g e. -16.7 kJ Heat of Vaporization of H2O: 2256 J/g 13) Calculate the enthalpy change when 7.78 g C2H5OH is burned in excess O2? (constant pressure) a. 1.37x10^3 kJ b. 1.07x10^4 kJ c. -1.37x10^3 kJ d. 2.31x10^2 kJ e. -2.31x10^2 kJ 14) A 1.00 g sample of C12H22O11 is burned in a bomb calorimeter containing 1.50 kg of H2O. The …


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