(1) g (2) g (3) 4.20 g (4) 1.80 g (5) 2.28g

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1 Form Code X NAME CHM 2045, Summer 2016, Final Exam Review Packet (Broward Teaching Center) Exam Packet Instructions: Do your best and don t be anxious. Read the question, re-read the question, write down all given or valuable information, and write down what you want to find. As on all graded events, the loving of moles applies 1) When 6.00 g of Fe and 8.00 g of Cl2 are combined, the following reaction occurs: 2 Fe + 3 Cl2 = 2 FeCl3 Once the reaction has occurred as completely as possible, what mass of the excess reactant is left? (1) g (2) g (3) 4.20 g (4) 1.80 g (5) 2.28g Formatted: Not Highlight 2) If a household microwave operates at a wavelength of 11 mm, approximately how many photons are needed to heat up a frozen corn that requires a total of 300 kj? (1) 1.66*10 28 photons (2) 1.81*10-23 photons (3) 1.10*10 3 photons (4) 10 photons (5) 300 photons Formatted: Not Highlight 3) Which of the following have a trigonal planar molecular shape? I) CO3 2- II) BF3 III) NH3 (1) I only (2) I and II only (3) I and III (4) II and III (5) All of them Formatted: Not Highlight

2 4) 2. The floor of an Olympic size pool has an area of 1250 m 2. How many liters of water, rounded to the nearest power of 10, are needed to fill the pool to an average depth of 4.8 ft? (1) 1*10 4 L (2) 1*10 5 L (3) 1*10 6 L (4) 1*10 7 L (5) 1*10 9 L 5) Which of the following quantum numbers (n, l, ml, ms) could be assigned to a valence electron in the ground state electron configuration of a neutral Calcium atom? (1) 2, 1, 1, +½ (2) 3, 0, 0, +½ (3) 3, 2, 2, +½ (4) 4, 0, 0, +½ (5) 4, 3, 3, +½ 6) For which of the following pure substances is dipole-dipole the strongest intermolecular force? I: CH2BrF II: HI III: CH3CHO (1) Only I (2) Only II (3) I and III (4) II and III (5) I, II, and III

3 7) Suppose g of hydrated lithium iodide, LiI xh2o, is dried in an oven. When the anhydrous salt is removed from the oven, its mass is g. What is the value of x? (1) 1 (2) 2 (3) 3 (4) 4 (5) 6 8) Element A has a higher effective nuclear charge than element B, because it has the same number of inner electrons and more protons than element B. Which of the following could be elements A and B? (1) A = Cl; B = Br (2) A = Cl; B = Kr (3) A = Kr, B = Ar (4) A = Kr, B = Br (5) A = Br, B = Kr 9) Palladium crystallizes in a face-centered cubic unit cell. Its density is g/cm 3. Calculate the atomic radius of palladium. 1) x 10 8 cm 2) x 10 8 cm 3) x cm 4) x cm 5) x cm

4 10) When 200 ml of M NH3 solution is added to 300 ml of an unknown NH3 solution, the final concentration of NH3 in the mixture is M. What was the molarity of NH3 in the unknown solution? (1) M (2) M (3) M (4) M (5) 1.1 M 11) A 40.0 g sample of NH4NO3 is dissolved in 150 g of water at 32.0 C in a coffee-cup calorimeter. If the enthalpy of dissolution of NH4NO3 is 25.7 kj/mol, what is the final temperature of the solution in the calorimeter? Assume that the specific heat capacity of the solution is J/g C. (1) 19.2 C (2) 27.7 C (3) 32.0 C (4) C (5) 1.2 C 12) Consider a liquid with a vapor pressure of 200. torr at 20.0 oc and a vapor pressure of 400. torr at 50.0 C. What is the closest value to the normal boiling point of this liquid? (1) 18.2 oc (2) 22.0 oc (3) 83.8 C oc (4) 295. C oc (5) 357. C oc

5 13) In which of the following equations are the base and conjugate base (proposed bases are underlined) incorrectly labeled? (1) HCl + H2O Cl - + H3O + (2) H2PO4 - + H2O H3PO4 + OH - (3) CN - + H2O HCN + OH - (4) CH3COOH + H2O CH3COO - + H3O + (5) HCO3 - + H2O H2CO3 + OH - 14) Rank the following five ions in order of increasing ionic radius: Na, Na +, Cs +, Ar, Br - (1) Na < Na + < Cs + < Ar < Br - (2) Cs + < Na + < Na < Ar < Br - (3) Br - < Na + < Cs + < Ar < Na (4) Na + < Cs + < Ar < Na < Br - (5) Br - < Na < Ar < Cs + < Na + 15) Which of the following changes will produce the highest final pressure for a gas originally at STP? (1) Not changing the absolute temperature and doubling the volume (2) Doubling the absolute temperature and not changing the volume (3) Doubling the absolute temperature and doubling the volume (4) Doubling the absolute temperature and tripling the volume (5) Tripling the absolute temperature and doubling the volume

6 16) Using the above table, determine the rate law. (1) rate = k [A] 2 [B] [C] (2) rate = k [A] [B] 2 [C] (3) rate = k [A] [B][C] 2 (4) rate = k [A] 2 2 [B] 2 2[C] (5) rate = k [A] [B] 2 2[C] ) Using the table, determine the rate constant (L3mol-3s-1). (1) 2.0 (2) 3.0 (3) 4.0 (4) 8.0 (5) ) In the above table, determine the missing number. (1) (2) (3) (4) (5) 0.016

7 19) Predict which solvent will dissolve more of the given solute: left= NaCl in HCl or H2O middle= CCl4 in CHCl3 or H2O right= CH3OH in H2O or C6H14 (1) H2O, CHCl3, H2O (2) HCl, H2O, C6H14 (3) H2O, H2O, H2O (4) HCl, CHCl3, H2O (5) HCl, CHCl3, C6H14 20) The decomposition of hydrogen iodide, 2HI(g) H2(g) + I2(g), has rate constants of 9.51x10-9 L/mol-s at 500. K and 1.10x10-5 L/mol-s at 600. K. What is the activation energy of the reaction? (1) 1.74x103 J (2) 1.76x105 J (3) 1.95x10-2 J (4) 5.38x104 J (5) 2.12x104 J 21) Which of the following is false? (1) Increasing the temperature increases the rate of a reaction (2) Increasing the temperature increases the rate constant of a reaction (3) The activation energy is the energy difference between reactants and products (4) The activation energies of the forward and reverse reactions are different for an exothermic reaction (5) Lowering the activation energy increases the rate of a reaction.

8 GOOD LUCK AND SMILE ON THE EXAM! -Broward Teaching Center

Form Code X. (1) 2.56 x photons (2) 5.18 x photons (3) 9.51 x photons (4) 5.15 x photons (5) 6.

Form Code X. (1) 2.56 x photons (2) 5.18 x photons (3) 9.51 x photons (4) 5.15 x photons (5) 6. Form Code X CHM 1025, Summer 2018 NAME Final Review Packet (Teaching Center) Final Packet Instructions: Do your best and don t be anxious. Read the question, re-read the question, write down all given