Honors Chemistry Semester 2 Final Exam MC Practice

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Colin Hugh Nash
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1 Honors Chemistry Semester 2 Final Exam MC Practice Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. What do the alkali metals all have in common? a) They all form +1 ions. b) They all have the same number of valence electrons. c) They all have similar physical properties. d) They all undergo similar reactions. e) all of the above 2. Which of the following statements about Lewis structures is FALSE? a) An octet is when an atom has 8 valence electrons. b) A duet is a stable electron configuration for helium. c) A covalent bond occurs when electrons are shared. d) An ionic bond occurs when electrons are transferred. e) All of the above statements are true. 3. The correct scientific notation for the number is: a) b) c) d) When an atom gains an electron, the resulting particle is called: a) an anion. b) a cation. c) an isotope. d) a proton When an atom loses an electron, the resulting particle is called: a) an isotope. b) an anion. c) a cation. d) a proton. 6. What is the correct Lewis structure for O2? a).... O = O b): O O : c):.... O - O: d) O-O 7. Group 8A elements are also called: a) noble gases. b) halogens. c) alkaline earth metals. d) alkali metals. 8. Isotopes are: a) atoms of the same element that have different number of neutrons. b) atoms of the same element that have the same number of neutrons. c) atoms of the same element that have different number of protons. d) atoms of the same element that have different number of electrons

2 9. Metals are located where on the periodic table? a) left side b) right side c) middle d) zig-zag diagonal line How many atoms are in 5.80 moles of He? a) b) 4.00 c) d) You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the largest number of moles? a) Cu b) Na c) Pb d) Ne e) C What would the formula of diiodine pentasulfide be? a) I2S5 b) I5S2 c) I4S9 d) I2S If molecules have a mass of grams, what is the molar mass of this substance? a) g/mol b) g/mol c) g/mol d) g/mol What is the name of the molecular compound SF5? a) monosulfur tetrafluoride b) sulfur pentafluoride c) sulfur heptafluoride d) sulfur hexafluoride What is the mass of atoms of sulfur in grams? a) 165 b) c) d) What is the mass of moles of chlorine gas? a) 19.9 b) 39.7 c) 63.3 d) How many moles of Cu are in Cu atoms? a) b) c) d) The name trisodium phosphate is incorrect for the compound Na3PO4 because: a) the sodium has a negative 3 charge. b) you cannot use a prefix for the first element in a molecular compound. c) you cannot use a prefix for the first element of an ionic compound. d) this compound should be called trisodium monophosphate. 19. Choose the pair of names and formulas that do NOT match. a) copper(ii) nitrite: Cu(NO2)2 b) copper(ii) nitrate: Cu(NO3)2 c) copper(i) nitrate: CuNO3 d) copper(ii) nitride: Cu3N2 e) all of these are correct

3 20. The charge of a vanadium ion in the compound V2O5 is: a) 2+ b) 5+ c) 10- d) Ammonium fluoride is considered which of the following? a) ionic compound b) molecular element c) molecular compound d) atomic element Which formula shown is incorrect for the name given? a) sodium hydrogen carbonate: NaHCO3 b) potassium hydroxide: KOH c) magnesium nitrite: Mg(NO2) Carbon monoxide is considered which of the following? a) molecular element b) ionic compound c) atomic element d) molecular compound 25. d) calcium carbonate: CaCO3 e) aluminum sulfate: Al2(SO4)3 22. A student wrote the formula for the compound aluminum phosphate as AlPO4. What is wrong with this formula? a) The formula should be Al(PO4). b) Aluminum is a nonmetal so it cannot form an ionic compound. c) The compound is not charge-neutral. d) There cannot be three different atom types in a chemical formula. e) Nothing is wrong with the formula. 23. What is the formula for an ionic compound made of barium and nitrogen? a) BaN b) Ba2N4 c) Ba2N3 d) Ba3N Which among the following elements does NOT exist as a diatomic molecule in nature? a) nitrogen b) fluorine c) hydrogen d) neon 27. Which formula shows the proper use of parentheses? a) Ca(NO3)2 b) Ca(SO4) c) (NH4)3(PO4) d) Ca(F)2 28. How many total atoms are in the formula Al2(CO3)3? a) 12 b) 9 c) 14 d) How many neutrons are present in Ne-22? a) 22 b) 32 c) 10 d)

4 30. The nucleus of an atom consists mainly of: a) protons and electrons. b) neutrons and electrons. c) protons, neutrons, and electrons. d) protons and neutrons The correct number of significant figures in the number 865,000 is: a) 6 b) 3 c) 4 d) ambiguous The number of protons in the nucleus of an atom: a) is the same as the number of e- in a neutral atom b) identifies the atom as a particular element. c) is the same for all isotopes of an element. d) is called the atomic number. e) all of the above In the number 48.93, which digit is estimated? a) 9 b) 3 c) 8 d) 4 e) None of the above, all digits are certain. 38. Considering the following precipitation reaction: How many electrons are in Br-? a) 36 b) 7 c) 4 d) Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) What is the correct complete ionic equation? a) Pb2+ + 2NO K+ + 2I- 33. Which of the following elements has only 12 protons? a) O b) C c) Zn d) Mg 33. Pb2+ + 2I- + 2K+ + 2NO3 - b) Pb2+ + 2NO3 - +2K+ + I- PbI2(s) + 2K+ + NO3 - c) Pb2+ + 2NO K+ + 2I- PbI2(s) + 2K+ + 2NO3 - d) Pb2+ + (NO3) K+ + 2I- 34. When the value is rounded to two significant figures, the number should be reported as: a) 4.45 b) 4.44 c) 4.5 d) PbI2(s) + 2K+ + 2NO3-35. The correct decimal representation 35. of is: a) 6,453 b) c) d)

5 39. Considering the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) What is the correct net ionic equation? a) Pb2+ + 2NO K+ + 2I- PbI2(s) + 2K+ + 2NO An aqueous solution is: a) water with a molecular compound dissolved in it. b) an ionic compound with water dissolved in it. c) water with another compound dissolved in it. d) any liquid with another compound dissolved in it. 43. b) Pb2+ + 2I- PbI2(s) c) 2NO K+ 2KNO3 d) Pb2+ + I2 - PbI2(s) 40. The compound sodium sulfate is soluble in water. When this compound dissolves in water, which ion listed below would be present in solution? a) S2- b) Na2 2+ c) SO4 2- d) O2-41. Which of the following compounds is SOLUBLE? a) calcium carbonate b) potassium carbonate c) copper carbonate d) strontium carbonate What are the coefficients for the following reaction when it is properly balanced? potassium iodide + lead (II) acetate lead (II) iodide + potassium acetate a) 3, 2, 2, 1 b) 1, 1, 2, 2 c) 2, 1, 1, 2 d) 2, 1, 1, The Lewis structure for carbon monoxide is : C O : This structures shows: a) 4 lone pairs and 3 bonding pairs. b) 2 lone pairs and 1 bonding pair. c) 4 lone pairs and 1 bonding pair. d) 2 lone pairs and 3 bonding pairs Which of the following compounds is INSOLUBLE? a) zinc sulfide b) lithium nitrate c) magnesium bromide d) potassium acetate What is the electron geometry if you have 4 electron groups around the center atom? a) trigonal bipyramidal b) trigonal planar c) tetrahedral d) linear e) not enough information 46. 5

6 47. What is the molecular geometry of SCl2? a) bent b) linear c) tetrahedral d) trigonal pyramidal e) not enough information How many moles of KOH are contained in 750. ml of 5.00 M KOH solution? a) mol b) 56.1 mol c) 3.75 mol d) 6.67 mol The total number of electrons to be counted for the Lewis structure of the PO4 3- polyatomic ion is: a) 32. b) 29. c) 26. d) Which intermolecular force is present in all molecules and atoms? a) dispersion forces b) X-forces c) dipole-dipole forces d) hydrogen bonding Which term matches the definition: The ability of an element to attract electrons within a covalent bond? a) dipole moment b) electronegativity c) polar covalent d) nonpolar covalent e) coulombic attraction 50. What is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 M HCl to a final volume of 1.20 L? a) M b) M c) 3.50 M d) M 51. How many grams of KCl are needed to make 50.0 ml of 2.45 M KCl? a) 1.52 b) 9.13 c) d) The electronegativity value for Mg is 1.2 and the value for O is 3.5. Based on these values, what type of bond is expected for a compound formed between Mg and O? a) pure covalent b) ionic c) polar covalent d) not enough information 55. Which of the following is considered a single electron group? a) a triple bond b) a lone pair of electrons c) a single bond d) a double bond e) all of the above

7 Answer Key Testname: HONORS CHEMISTRY 2ND SEMESTER REVIEW 1. e 2. e 3. c 4. a 5. c 6. a 7. a 8. a 9. a 10. e 11. c 12. a 13. b 14. d 15. c 16. a 17. b 18. c 19. e 20. b 21. c 22. e 23. d 24. a 25. d 26. d 27. a 28. c 29. d 30. d 31. e 32. a 33. d 34. d 35. a 36. d 37. b 38. c 39. b 40. c 41. b 42. a 43. c 44. c 45. d 46. c 47. a 48. a 49. b 50. b 7

8 Answer Key Testname: HONORS CHEMISTRY 2ND SEMESTER REVIEW 51. b 52. c 53. a 54. b 55. e 8

Chapter 6 and 7 Practice MC

Chapter 6 and 7 Practice MC MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Ammonium fluoride is considered which of the following? 1) A) molecular