Test Bank For Chemistry and Chemical Reactivity, 10th Edition

Chapter 02 1. Which of the following statements concerning atomic structure is/are correct? 1. Neutrons and electrons are found in space as a cloud around the nucleus. 2. The nucleus contains all the positive charge of an atom. 3. Electrons surround the nucleus and account for the majority of an atom’s volume. a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 2. Atoms are made of three subatomic particles. What are these particles and their charges? a. proton (+1), neutron (0), and electron (−1) b. proton (−1), neutron (+1), and electron (0) c. proton (+1), neutron (−1), and electron (0) d. proton (0), neutron (+1), and electron (−1) e. proton (−1), neutron (0), and electron (+1) ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:22 AM 3. Arrange the subatomic particles in order of their increasing mass. a. Electron mass = proton mass = neutron mass b. Electron mass = neutron mass < proton mass c. Electron mass = proton mass < neutron mass d. Electron mass < proton mass < neutron mass e. Electron mass < proton mass = neutron mass ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:26 AM 4. Atomic number is equal to the _____ in the nucleus of an atom. a. number of electrons b. number of protons c. number of protons minus the number of neutrons Copyright Cengage Learning. Powered by Cognero. Page 1 Chapter 02 d. sum of the number of electrons and neutrons e. sum of the number of neutrons and protons ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:28 AM 5. The atomic number of fluorine is _____. a. 7 b. 9 c. 10 d. 19 e. 13 ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:29 AM 6. Which of the following statements is/are correct? A hydrogen atom with one proton and zero neutrons is assigned a mass of exactly one 1. atomic mass unit. 2. One atomic mass unit is equivalent to 9.11 × 10−28 g. A carbon atom with six protons and six neutrons is assigned a mass of exactly 12 3. atomic mass units. a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2, and 3 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:31 AM 7. What is the mass number of an atom of argon with 22 neutrons? a. 2 b. 18 c. 22 d. 40 e. 44 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass Copyright Cengage Learning. Powered by Cognero. Page 2 Chapter 02 DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 6:33 AM 8. A neutral atom of an isotope 200Hg contains _____. a. 200 neutrons and 280 electrons b. 80 protons and 200 neutrons c. 200 protons and 120 electrons d. 200 protons, 80 neutrons, and 200 electrons e. 80 protons and 120 neutrons ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic weight NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:06 AM 9. How many protons are there in an atom of scandium-45? a. 25 b. 66 c. 20 d. 21 e. 24 ANSWER: d POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 10. How many protons, neutrons, and electrons are present in an atom of iron-59? a. 26 protons, 33 neutrons, and 59 electrons b. 26 protons, 33 neutrons, and 33 electrons c. 26 protons, 33 neutrons, and 26 electrons d. 59 protons, 26 neutrons, and 59 electrons e. 59 protons, 26 neutrons, and 26 electrons ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:13 AM Copyright Cengage Learning. Powered by Cognero. Page 3 Chapter 02 11. What is the mass of chlorine-35 relative to carbon-12? a. 0.657 b. 0.522 c. 1.52 d. 2.92 e. 23 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 12. Which of the following atoms contains the least protons? a. 232Th b. 231Pa c. 245Pu d. 238U e. 232Pa ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:47 AM 13. Which of the following atoms contains more protons than neutrons? a. b. c. d. e. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 14. Which of the following is the correct atomic symbol for an element with 17 protons and 18 neutrons? a. b. c. d. e. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:48 AM Copyright Cengage Learning. Powered by Cognero. Page 4 Chapter 02 15. Which of the following elements does 'X' represent in ? a. Ni b. Zn c. Rn d. Ce e. Pd ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:50 AM 16. Which of the following is the correct atomic symbol for an element that has 30 neutrons and a mass number of 55? a. At b. Zn c. Co d. Mn e. Cs ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:55 AM 17. How many neutrons are there in an atom of copper-63 ? a. 29 b. 2 c. 92 d. 63 e. 34 ANSWER: e POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:56 AM 18. Which of the following atoms contains the largest number of neutrons? a. b. c. d. e. ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM Copyright Cengage Learning. Powered by Cognero. Page 5 Chapter 02 19. An atom that has the same number of neutrons as nickel-59 is _____. a. b. c. d. e. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 9:57 AM 20. Two isotopes of a given element will have the same number of _____, but a different number of _____ in their nucleus. a. protons; electrons b. electrons; protons c. protons; neutrons d. neutrons; protons e. electrons; neutrons ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:00 AM 21. If two different isotopes have the same atomic number, it means that _____. a. they have the same atomic mass b. they have the same atomic number c. they have the same number of protons d. they have the same number of electrons e. they have the same number of neutrons ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:04 AM 22. Which of the following atomic symbols represents an isotope of a. b. c. d. Copyright Cengage Learning. Powered by Cognero. ? Page 6 Chapter 02 e. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic Weight NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:11 AM 23. Which of the following statements is true concerning a. They have the same number of neutrons. b. They are isotopes. c. They have the same relative atomic mass. d. They have the same mass number. e. They have different chemical properties. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic Weight NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 8/4/2014 6:11 PM and ? 24. The masses of isotopes and their abundances are determined experimentally using _____. a. a mass spectrometer b. an analytical balance c. a centrifuge d. distillation e. electrolysis ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:23 AM 25. A sample of an element consists of two isotopes. The percent abundance of one of the isotopes is 75.0%. What is the percent abundance of the other isotope? a. 62.5% b. 37.5% c. 12.5% d. 75.0% e. 25.0% Copyright Cengage Learning. Powered by Cognero. Page 7 Chapter 02 ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic Weight NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:28 AM 26. The mass spectrum of an element with two naturally occurring isotopes is shown below. What is the best estimate of the element’s (average) atomic weight? a. 10 amu b. 11 amu c. 10.8 amu d. 10.2 amu ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM e. 10.5 amu 27. Lithium has two naturally occurring isotopes, 6Li and 7Li. The atomic weight of lithium is 6.941. Which of the following statements concerning the relative abundance of each isotope is correct? a. The abundance of 7Li is greater than 6Li. b. The abundance of 7Li is less than 6Li. c. The abundance of 6Li is equal to the abundance of 7Li. d. Not enough data is provided to determine the correct answer. e. Based on the atomic mass, only 7Li occurs naturally. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:30 AM Copyright Cengage Learning. Powered by Cognero. Page 8 Chapter 02 28. The element chlorine has two stable isotopes, chlorine-35 with an atomic mass of 34.97 u and chlorine-37 with an atomic mass of 36.97 u. From the atomic weight found on the periodic table, one can conclude that _____. a. both isotopes have the same percent natural abundance b. there is an isotope of nitrogen with an atomic mass of 35.45 u c. chlorine-35 has the highest percent natural abundance d. chlorine-37 has the highest percent natural abundance e. there is an isotope of nitrogen with an atomic mass of 37.95 u ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic Weight NOTES: OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:39 AM 29. Rubidium has two naturally occurring isotopes. The atomic weight of Rb is 85.4678 u. If 72.15% of Rb is found as Rb-85 (84.9117 u), what is the mass of the other isotope? a. 0.56 u b. 85.68 u c. 86.68 u d. 86.02 u e. 83.47 u ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:49 AM 30. An element consists of three isotopes. The abundance of one isotope is 92.21% and its atomic mass is 27.97693 u. The abundance of the second isotope is 4.70% and its atomic mass is 28.97649 u. The atomic mass of the third isotope is 29.97376 u. What is the atomic weight of the element? a. 28.09 u b. 28.98 u c. 28.96 u d. 29.87 u e. 29.07 u ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 31. Naturally occurring element X exists in three isotopic forms: X-28 (27.979 u, 90.64% abundance), X-29 (28.976 u, 4.00% abundance), and X-30 (29.974 u, 5.36% abundance). Calculate the atomic weight of X. a. 29.64 u b. 28.13 u c. 28.99 u d. 29.83 u e. 27.15 u ANSWER: b Copyright Cengage Learning. Powered by Cognero. Page 9 Chapter 02 POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.2 Isotopes and Atomic Weight NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 8/4/2014 6:12 PM 32. A certain element consists of two stable isotopes. The first has a mass of 14.0031 amu and a percent natural abundance of 99.63%. The second has a mass of 15.001 amu and a percent natural abundance of 0.37%. What is the atomic weight of the element? a. 13.95 amu b. 14.00 amu c. 14.01 amu d. 14.50 amu e. 19.50 amu ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight NOTES: Dynamic Question | OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:50 AM 33. Copper has an atomic weight of 63.55 u. If 69.17% of copper exists as 63Cu (62.93960 u), what is the identity and the atomic mass of the other isotope? a. Cu-64; 63.82 u b. Cu-64; 64.16 u c. Cu-65; 64.16 u d. Cu-65; 64.92 u e. Cu-66; 65.91 u ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:51 AM 34. Silver has two stable isotopes with masses of 106.90509 u and 108.9047 u. The atomic weight of silver is 107.868 u. What is the percent abundance of each isotope? a. 50.0% 107Ag and 50.0% 109Ag b. 51.8% 107Ag and 48.2% 109Ag c. 55.4% 107Ag and 44.6% 109Ag d. 48.2% 107Ag and 51.8% 109Ag Copyright Cengage Learning. Powered by Cognero. Page 10 Chapter 02 e. 44.6% 107Ag and 55.4% 109Ag ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:56 AM 35. The elements in groups 1A-8A are known as the _____. a. main group elements b. transition metals c. halogens d. metalloids or semimetals e. noble gases ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.3 The Periodic Table NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 10:59 AM 36. Which of the following statements is/are correct? 1. The group 3A elements are also known as the chalcogens. 2. The noble gases are sometimes called rare earth elements. 3. The halogens, or group 7A elements, all exist as diatomic molecules. a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:10 AM 37. Which of the following elements is present in the fourth period of Group 3A? a. Sb b. Ga c. In d. Si e. Tl ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero. Page 11 Chapter 02 HAS VARIABLES: TOPICS: DATE CREATED: DATE MODIFIED: False 2.3 The Periodic Table 3/5/2014 6:34 PM 1/31/2018 11:11 AM 38. Which of the following elements is present in the third period of group 7A? a. S b. Cl2 c. I2 d. H2 e. Ar ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:11 AM 39. Which of the following statements is not true about the element vanadium? a. It is a metal. b. It has chemical and physical properties most similar to krypton. c. It is in period 4. d. It has chemical and physical properties most similar to silver. e. It is in group 5B. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.3 The Periodic Table NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:15 AM 40. Which of the following groups of periodic table contains only nonmetals? a. 2A b. 3A c. 5A d. 6A e. 7A ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:16 AM 41. Which of the following elements belongs to the alkaline earth metals series? a. Barium b. Potassium c. phosphorus d. Bromine Copyright Cengage Learning. Powered by Cognero. Page 12 Chapter 02 e. Argon ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.3 The Periodic Table NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:25 AM 42. Which of the following elements is present in fourth period of group 3? a. Flourine b. Chlorine c. Barium d. Argon e. Sodium ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.3 The Periodic Table NOTES: Dynamic Question | OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:28 AM 43. What is the common name of the group that has an element with 38 protons in its nucleus? a. Transition metals b. Halogens c. Noble gases d. Alkaline earth metals e. Alkali metals ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.3 The Periodic Table NOTES: Dynamic Question | OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:37 AM 44. Which of the following elements is not a metalloid? a. Boron b. Selenium c. Germanium d. Arsenic e. Silicon ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero. Page 13 Chapter 02 TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:38 AM 45. The formula of acetic acid, CH3CO2H, is an example of a(n) _____. a. condensed formula b. empirical formula c. structural formula d. ionic compound formula e. elemental formula ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.4 Molecules, Compounds, and Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:40 AM 46. C2H2F4 is the formula for two possible molecules. C2H2F4 is an example of a(n) _____. a. structural formula b. empirical formula c. condensed formula d. spatial formula e. molecular formula ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.4 Molecules, Compounds, and Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:42 AM 47. Which of the following atoms of elements is most likely to form a 2– ion? a. Potassium b. Magnesium c. Phosphorus d. Bromine e. Sulfur ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM Copyright Cengage Learning. Powered by Cognero. Page 14 Chapter 02 DATE MODIFIED: 1/31/2018 11:44 AM 48. Which of the following atoms of elements is most likely to form a 2+ ion? a. Scandium b. Calcium c. Aluminum d. Oxygen e. Fluorine ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:50 AM 49. Which of the following sets of ions is present in sodium sulfate, Na2SO4? a. Na+, S2−, and O2− b. Na+, S2+, and O2− c. Na+ and SO42− d. Na+, S2−, and O2+ e. Na+ and SO4− ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:50 AM 50. Which of the following sets of ions is present in calcium hydrogen phosphate, CaHPO4? a. Ca2+ and PO43– b. Ca2+ and HPO42– c. Ca+ and HPO4– d. Ca3+ and HPO43– e. Ca2+, H+, P3–, and O2– ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties Copyright Cengage Learning. Powered by Cognero. Page 15 Chapter 02 DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:51 AM 51. What charge is likely possible on a monatomic silver cation? a. 2– b. 1– c. 1+ d. 2+ e. 3+ ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 12:52 PM 52. For a nonmetal in Group 6A of the periodic table, the most common monatomic ion will have a charge of _____. a. 3– b. 2– c. 1– d. 1+ e. 2+ ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 12:52 PM 53. Scandium(III) sulfite is an ionic compound formed from Sc3+ and SO32-. What is the correct way to represent the formula? a. ScSO3+ b. Sc(SO3)2c. Sc3+SO32d. Sc2(SO3)3 e. Sc5(SO3)8 ANSWER: d POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 12:57 PM Copyright Cengage Learning. Powered by Cognero. Page 16 Chapter 02 54. Which of the following formulas is not correct? a. AlPO4 b. KClO4 c. CaS d. Na(NO3)2 e. Na2HPO4 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 55. Which of the following is the correct formula for an ionic compound that contains barium ions and carbonate ions? a. BaCO3 b. Ba(HCO3)2 c. Ba2CO3 d. Ba2C e. Ba(CO3)2 ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 12:59 PM 56. The chemical formula for chromium(III) sulfate is _____. a. CrSO4 b. Cr(SO4)3 c. Cr2(SO4)3 d. Cr2SO4 e. Cr3(SO4)2 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:01 PM 57. What is the charge on the sodium ion in Na3P? a. 3– b. 1– c. 0 d. 1+ e. 3+ ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question DATE CREATED: 12/29/2017 4:36 AM DATE MODIFIED: 2/1/2018 12:52 AM Copyright Cengage Learning. Powered by Cognero. Page 17 Chapter 02 58. Which of the following is the correct formula for calcium nitrate? a. CaN b. Ca3N2 c. CaNO2 d. Ca3(NO3)2 e. Ca(NO3)2 ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:02 PM 59. Which of the following is the correct formula for potassium dihydrogen phosphate? a. KH2PO4 b. K2HPO4 c. K2H2PO4 d. K3H2PO4 e. KH2P ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:03 PM 60. The formula for aluminum fluoride is _____. a. AlF3 b. AlF c. Al2F d. AlF4 e. AlF2 ANSWER: a POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:04 PM 61. Which of the following is the correct formula for cobalt(III) bromide? a. CoBr b. CoBr3 c. Co2Br3 d. Co3Br2 e. Co3Br ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties Copyright Cengage Learning. Powered by Cognero. Page 18 Chapter 02 DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:05 PM 62. Which of the following is the correct formula for manganese(III) sulfate? a. MnSO4 b. Mn2SO4 c. Mn3(SO4)2 d. Mn2(SO4)3 e. Mn(SO4)2 ANSWER: d POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:06 PM 63. The correct name for Cd2+ is _____. a. monocadmium ion b. cadmium(II) ion c. cadmium(2) ion d. cadmium(I) ion e. cadmium ANSWER: b POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:11 PM 64. What is the symbol for an ion of an element that has 12 protons and 10 electrons? a. Mg2+ b. Mg2c. Ne2+ d. Ne2e. Ti2+ ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: Dynamic Question | OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 2:07 AM 65. Which of the following is the correct name for the compound NH4NO3? Copyright Cengage Learning. Powered by Cognero. Page 19 Chapter 02 a. Ammonia hydrogen nitrate b. Ammonia hydrogen nitride c. Ammonium nitric acid d. Ammonium nitrate e. Ammonium nitride ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:13 PM 66. What is the formula for the compound that is formed of ammonium and bromide ions? a. NH3Br b. NH4Br c. NH3Br2 d. NH4Br2 e. (NH4)2Br ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties NOTES: OWL DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:15 PM 67. Which of the following is the correct name for the compound SrCl2? a. Strontium dichloride b. Strontium dichlorine c. Strontium(III) dichloride d. Strontium chloride e. Iodine strontide ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:16 PM 68. Which of the following is the correct name for the compound Ca(CH3CO2)2? a. Calcium(II) carbonate b. Calcium carbonate c. Calcium acetate d. Acetic calcide Copyright Cengage Learning. Powered by Cognero. Page 20 Chapter 02 e. Calcium carbonide ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:17 PM 69. Which of the following statements concerning ionic compounds is/are correct? 1. As ion charges increase, the attraction between oppositely charged ions increases. 2. Ionic compounds are malleable and conduct electricity. 3. Positive and negative ions are attracted to each other by electrostatic forces. a. 1 only b. 2 only c. 3 only d. 1 and 3 e. 1, 2, and 3 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:18 PM 70. Which of the following ionic compounds has the highest melting point? a. KBr b. MgO c. RbI d. CaBr2 e. CsCl ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 1:19 PM 71. The correct name for the compound P2F4 is _____. a. diphosphorus tetrafluoride b. phosphorus fluoride c. diphosphide tetrafluoride d. diphosphorus tetrafluorine e. phosphorus tetrafluorine ANSWER: a POINTS: 1 QUESTION TYPE: Multi-Mode (Multiple choice) HAS VARIABLES: True Copyright Cengage Learning. Powered by Cognero. Page 21 Chapter 02 TOPICS: NOTES: DATE CREATED: DATE MODIFIED: 2.5 Ionic Compounds: Formulas, Names, and Properties Dynamic Question 3/5/2014 6:34 PM 1/31/2018 11:43 PM 72. Which of the following is the correct name for the compound CCl4? a. Carbon chlorine b. Tetracarbon chloride c. Carbon tetrachloride d. Carbon(IV) chloride e. Tetrachlorocarbide ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:44 PM 73. Which of the following is the common name for the compound PH3? a. Laughing gas b. Hydrazine c. Nitroglycerin d. Ammonia e. Phosphine ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:45 PM 74. You have 2.50 g of each of the following elements: Ca, Cu, Cs, C, and Cr. Which sample contains the largest number of atoms? a. Ca b. Cu c. Cs d. C e. Cr ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero. Page 22 Chapter 02 TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 75. What is the molecular mass of cyclononane, C9H18? a. 13.02 g/mol b. 1963.92 g/mol c. 109.11 g/mol d. 126.24 g/mol e. 30.15 g/mol ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.6 Atoms, Molecules, and the Mole NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 8/4/2014 6:16 PM 76. Calculate the number of moles in 0.48 g of Cu. a. 0.033 mol b. 0.48 mol c. 31 mol d. 7.6 × 10−3 mol e. 1.3 × 102 mol ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:46 PM 77. What is the approximate mass of 0.71 mol Na? a. 1.2 × 10–24 g b. 12 g c. 16 g d. 0.031 g e. 32 g ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero. Page 23 Chapter 02 TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:47 PM 78. A 0.0050 g sample of boron contains _____ boron atoms. a. 4.6 × 10–4 b. 7.7 × 10–28 c. 2.8 × 1020 d. 3.1 × 1021 e. 3.3 × 1022 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:48 PM 79. The molar mass of platinum is 195.08 g/mol. What is the mass of 1.00 × 102 Pt atoms? a. 8.51 × 10–25 g b. 3.24 × 10–24 g c. 1.67 × 10–22 g d. 3.24 × 10–22 g e. 3.24 × 10–20 g ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:49 PM 80. A 0.4272 g sample of an element contains 2.241 × 1021 atoms. What is the symbol of the element? a. In b. Cs c. Sb d. Xe e. Te ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero. Page 24 Chapter 02 HAS VARIABLES: TOPICS: NOTES: DATE CREATED: DATE MODIFIED: True 2.6 Atoms, Molecules, and the Mole Dynamic Question 8/12/2014 6:45 PM 1/31/2018 11:50 PM 81. What mass of aluminum contains the same number of atoms as 3.0 g of lead? a. 23 g b. 0.014 g c. 3.0 g d. 0.39 g e. 0.11 g ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:51 PM 82. A nail is coated with a 0.053 cm thick layer of zinc. The surface area of the nail is 8.59 cm2. The density of zinc is 7.13 g/cm3. How many zinc atoms are used in the coating? a. 5.9 × 1020 atoms b. 3.0 × 1022 atoms c. 3.8 × 1022 atoms d. 2.0 × 1024 atoms e. 1.3 × 1026 atoms ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 83. Which of the following is the correct molar mass of calcium chloride hexahydrate? a. 75.53 g/mol b. 111.0 g/mol c. 117.0 g/mol d. 183.6 g/mol e. 219.1 g/mol ANSWER: e POINTS: 1 Copyright Cengage Learning. Powered by Cognero. Page 25 Chapter 02 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:53 PM 84. Which of the following is the correct molar mass of sodium sulfate? a. 55.06 g/mol b. 119.1 g/mol c. 78.05 g/mol d. 142.0 g/mol e. 110.0 g/mol ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 1/31/2018 11:54 PM 85. Calculate the number of moles of aluminum oxide in 6.83 g of Al2O3. a. 6.70 × 10–2 mol b. 6.96 × 102 mol c. 0.253 mol d. 0.127 mol e. 1.56 × 10–3 mol ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:04 AM 86. Calculate the mass of 8.04 × 10–3 mol of O2. a. 2.51 × 10–4 g b. 5.03 × 10–4 g c. 0.129 g d. 3.89 g e. 0.257 g ANSWER: POINTS: e 1 Copyright Cengage Learning. Powered by Cognero. Page 26 Chapter 02 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:06 AM 87. Calculate the mass of 0.50 mol of chromium(III) sulfide. a. 2.5 × 10–3 g b. 5.9 × 10–3 g c. 42 g d. 1.0 × 102 g e. 110 g ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:07 AM 88. How many hydrogen atoms are present in 1.0 g of NH3? a. 0.059 atoms b. 0.18 atoms c. 3.5 × 1022 atoms d. 1.1 × 1023 atoms e. 1.2 × 1022 atoms ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:07 AM 89. How many bromide ions are present in 0.55 g of iron(III) bromide? a. 1.1 × 1021 ions b. 3.4 × 1021 ions c. 3.3 × 1023 ions d. 9.9 × 1023 ions e. 2.9 × 1026 ions ANSWER: b Copyright Cengage Learning. Powered by Cognero. Page 27 Chapter 02 POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:09 AM 90. If 1.00 g of an unknown molecular compound contains 8.35 × 1021 molecules, what is its molar mass? a. 44.0 g/mol b. 66.4 g/mol c. 72.1 g/mol d. 98.1 g/mol e. 132 g/mol ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 8/4/2014 6:18 PM 91. Calculate the mass percent of chlorine in magnesium chloride. a. 25.53% b. 37.24% c. 40.67% d. 59.33% e. 74.47% ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:09 AM 92. Which of the following is the correct mass percent of each element in sulfuric acid, H2SO4? a. 2.055% H, 32.69% S, and 65.25% O b. 1.028% H, 32.69% S, and 66.28% O c. 28.57% H, 14.29% S, and 57.17% O d. 1.028% H, 33.72% S, and 65.25% O e. 2.016% H, 32.07% S, and 65.91% O ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice Copyright Cengage Learning. Powered by Cognero. Page 28 Chapter 02 HAS VARIABLES: TOPICS: DATE CREATED: DATE MODIFIED: False 2.7 Chemical Analysis: Determining Compound Formulas 3/5/2014 6:34 PM 2/1/2018 12:12 AM 93. Determine the empirical formula of an oxide of nitrogen that contains 46.67 % nitrogen by mass. a. N2O5 b. N c. N2O d. N22 e. NO ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:13 AM 94. A molecule is found to contain 47.35% C, 10.60% H, and 42.05% O by mass. Determine the empirical formula for this molecule. a. C2H6O b. C3H4O c. C3H8O2 d. C4H6O2 e. C4H8O3 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:14 AM 95. An ionic compound has the formula MCl2. The mass of 0.3011 mol of the compound is 62.69 grams. What is the identity of the metal? a. Nickel (Ni) b. Copper (Cu) c. Tin (Sn) d. Mercury (Hg) e. Barium (Ba) ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:16 AM 96. The fully hydrated form of sodium sulfate is the decahydrate, Na2SO4⋅10H2O. This compound dehydrates (loses some waters of hydration) when heated. A sample of partially dehydrated sodium sulfate was found to have a molar mass of 232 g/mol. How many water molecules are found per formula unit in in this sample? (Determine n in Na2SO4⋅ nH2O). Copyright Cengage Learning. Powered by Cognero. Page 29 Chapter 02 a. 5 molecules of water b. 8 molecules of water c. 10 molecules of water d. 6 molecules of water e. 1 molecules of water ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: True TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas NOTES: Dynamic Question DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:19 AM 97. A 3.592 g sample of hydrated magnesium bromide, MgBr2⋅xH2O, is dried in an oven. When the anhydrous salt is removed from the oven, its mass is 2.263 g. What is the value of x? a. 1 b. 3 c. 6 d. 8 e. 12 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 98. A 2.000 g sample of MgCl2⋅xH2O is dried in an oven. When the anhydrous salt is removed from the oven, its mass is 0.9366 g. What is the value of x? a. 1 b. 3 c. 6 d. 8 e. 12 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.7 Chemical Analysis: Determining Compound Formulas DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 3/5/2014 6:34 PM 99. Elements that have the same number of protons, but differ in their number of neutrons are called _____. isotopes ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.2 Isotopes and Atomic Weight DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:20 AM Copyright Cengage Learning. Powered by Cognero. Page 30 Chapter 02 100. Pure oxygen can exist as O2 or O3. Elements that exist in more than one distinct form are called _____. allotropes ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:20 AM 101. Oxygen and _____ are the two most abundant elements in the Earth’s crust. silicon ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:21 AM 102. Write the names of metalloids present in the periodic table. Boron, silicon, germanium, arsenic, (antimony, and tellurium) ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:22 AM 103. In a reaction, metals generally lose electrons to become _____, and nonmetals gain electrons to become anions. cations ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:23 AM 104. Which ionic compound has the stronger force of attraction between anions and cations: sodium bromide or potassium bromide? The force of attraction is stronger for sodium bromide. The electrostatic attraction between anions ANSWER: and cations decreases as the separation of the ions increases. The potassium ion will be farther from the bromide ion than the sodium ion due to its larger ionic radius. POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False Copyright Cengage Learning. Powered by Cognero. Page 31 Chapter 02 TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:26 AM 105. The numerical quantity of a mole, 6.022 × 1023, is defined as the number of atoms in a specific mass of an element. What is the mass and the identity of the element used to define one mole? A mole is equal to the number of atoms in 12.00 grams of carbon-12 isotope. ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.6 Atoms, Molecules, and the Mole DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:26 AM 106. The building blocks of atoms (neutrons, protons, and electrons) are called _____ particles. subatomic ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:27 AM 107. William Crookes was the first to observe particles produced from a cathode ray tube. These particles are known as ________. electrons ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:28 AM 108. Millikan’s oil drop experiment determined the charge of the _____. electron ANSWER: POINTS: 1 QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False TOPICS: 2.3 The Periodic Table DATE CREATED: 3/5/2014 6:34 PM DATE MODIFIED: 2/1/2018 12:28 AM 109. One atomic mass unit is equal to one-twelfth of the mass of an atom of _____. a. carbon with six protons and six neutrons b. hydrogen with one proton and one neutron Copyright Cengage Learning. Powered by Cognero. Page 32 Chapter 02 c. oxygen with eight protons and eight neutrons d. sodium with 11 atoms and 12 neutrons e. magnesium with 12 atoms and 12 neutrons ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.1 Atomic Structure, Atomic Number, and Atomic Mass DATE CREATED: 2/1/2018 12:29 AM DATE MODIFIED: 2/1/2018 12:37 AM 110. Which of the following is true about negative ions? a. Negatively charged ions of the Group 6A elements are called halide ions. b. Negatively charged ions of the Group 1A and 2A elements are called halide ions. c. Polyatomic negative ions containing oxygen are called oxoanions. d. Polyatomic negative ions are very rare. e. Monoatomic negative ions are referred to as oxoanions. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: 2.5 Ionic Compounds: Formulas, Names, and Properties DATE CREATED: 2/1/2018 12:32 AM DATE MODIFIED: 2/1/2018 12:34 AM Copyright Cengage Learning. Powered by Cognero. Page 33