c2 - additional practice questions

7/16/14, 3:31 PM Additional Practice QuestionsPage 1 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html Additional Practice Questions This activity contains 51 questions. The element zinc consists of five isotopes with masses 63.929, 65.926, 66.927, 67.925, and 69.925 amu. The relative abundances of these five isotopes are 48.89, 27.81, 4.110, 18.57, and 0.62 percent, respectively. From this data, calculate the average atomic mass of zinc. 63.93 amu 66.93 amu 65.387 amu 66.927 amu 65.39 amu If 60 g of carbon combine with 10 g of hydrogen to form a compound, this means that any sample of this compound will contain ___ part(s) carbon and ___ part(s) hydrogen by mass. 6, 0.17 1, 1 5, 10 5, 1 6, 1 How many neutrons are there in the nucleus of a 108 Ag atom? 54 61 47 108 none of these Home Chapter 2. Atoms, Molecules, and Ions Question Sets Additional Practice Questions 7/16/14, 3:31 PM Additional Practice Questions Page 2 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html What is the mass number of an isotope of mercury that has 122 neutrons? 200 202 122 80 120 All of the following except ________ are metalloids. Al Si Ge As B An elemental ion has 34 protons, 36 electrons, and 44 neutrons. Which isotope is it? Which one of the following is incorrectly labeled? 7/16/14, 3:31 PM Additional Practice Questions Page 3 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html Mg; alkali metal Ca; alkaline earth metal I; halogen Rn; noble gas Te; chalcogen How many protons and neutrons are there in ? 43 protons and 55 neutrons 55 protons and 43 neutrons 98 protons and 43 neutrons 43 protons and 98 neutrons Which of the following statements is true for neutral atoms? It is possible for neutral atoms of different elements to have the same number of electrons. The number of neutrons in a neutral atom must always equal the number of protons. The number of neutrons in a neutral atom must always equal the number of electrons. It is possible for neutral atoms of different elements to have the same number of neutrons. It is possible for neutral atoms of different elements to have the same number of protons. Which pair of symbols below represents isotopes? 7/16/14, 3:31 PM Additional Practice Questions Page 4 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html 16 O, 16 N 16 O, 17 O H, He He, He + 13 C, 14 N Naturally occurring lithium consists of two isotopes: 6 Li and 7 Li. How many neutrons are in each isotope? 3, 4 3, 3 4, 4 4, 3 6, 7 An atom containing 34 protons, 43 neutrons, and 34 electrons would have the symbol 77 Se. 77 Ir. 77 Tc. 43 Se. 43 Tc. An iron-56 nucleus contains 56 protons. 56 neutrons. 7/16/14, 3:31 PM Additional Practice Questions Page 5 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html 26 protons and 26 neutrons. 56 protons and 56 neutrons. 26 protons and 30 neutrons. An element in the lower left corner of the periodic table is either a metal or a metalloid. is definitely a metal. is either a metalloid or a nonmetal. is definitely a nonmetal. is definitely a metalloid. Which one of the following is incorrectly labeled? Ne; noble gas Cu; transition metal Zn; transition metal Ga; transition metal Cl; halogen Which of the following is a metal? Zn; F; S; I; Se Zn F S I Se 7/16/14, 3:31 PM Additional Practice Questions Page 6 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html Which of the following compounds would you expect to be molecular and not ionic? CaO (calcium oxide, an acid-neutralizing agent) SiC (silicon carbide, an abrasive) TiO 2 (titanium dioxide, formed in skywriting) KCl (potassium chloride, a dietary salt substitute) ZnS (zinc sulfide, used in photo-sensors) Which one of the following elements does not exist as a diatomic molecule? F O S H N Which one of the following contains the greatest number of electrons? P P 3+ P 2+ P 2! P 3! Which of the following statements is true about the following compounds? CO 2 ; KCl; KNO 3 ; N 2 O 7/16/14, 3:31 PM Additional Practice Questions Page 7 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html KNO 3 is the only ionic compound. KCl, KNO 3 , and N 2 O are the only ionic compounds. CO 2 is the only molecular compound. CO 2 , KNO 3 , and N 2 O are the only molecular compounds. CO 2 and N 2 O are the only molecular compounds. KCl is the only ionic compound. How many carbon atoms are in CH 3 —O—CH 2 —C 2 H 5 ? 1 3 2 4 10 Predict the product formed when calcium, Ca, combines with arsenic, As. Ca 2 As 3 Ca 3 As 2 CaAs Ca 2 As CaAs 2 Which name is incorrect? SCl 2 , sulfur dichloride 7/16/14, 3:31 PM Additional Practice Questions Page 8 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html CS 2 , carbon disulfide CCl 4 , carbon tetrachloride N 2 O 4 , dinitrogen tetroxide Al 2 O 3 , dialuminum trioxide Which one of the following is named correctly? Ca(HS) 2 , calcium sulfide HBrO 2 , bromic acid AlN, aluminum nitride FeO, iron(III) oxide NH 4 + , ammonia Which ionic formula is incorrect? K(NO 3 ) 2 CaCO 3 Fe(OH) 2 (NH 4 ) 2 S Ca(ClO 3 ) 2 A certain metallic element forms a compound with chlorine, having the general formula XCl 2 . The X ion in this compound has 28 electrons. What is element X? Ni Zn Fe 7/16/14, 3:31 PM Additional Practice Questions Page 9 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html V 90 Sr 2+ has 38 protons, 52 neutrons, and 36 electrons. 38 protons, 52 neutrons, and 38 electrons. 38 protons, 52 neutrons, and 40 electrons. 52 protons, 38 neutrons, and 50 electrons. 52 protons, 38 neutrons, and 54 electrons. Which of the following compounds is not a possible ionic compound? CsCl SrO GaF 3 Cs 2 O NaF 2 How many hydrogen atoms are in CH 3 CH(CH 3 ) 2 ? 3 6 8 10 12 7/16/14, 3:31 PM Additional Practice Questions Page 10 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html Which of the following are ionic and which are molecular? NO; K 2 O; SrCO 3 ; SiCl 4 ; AsH 3 NO, SiCl 4 , and AsH 3 are the only molecular compounds. NO, SiCl 4 , and K 2 O are the only molecular compounds. K 2 O is the only ionic compound. NO, K 2 O, and SrCO 3 are the only ionic compounds. AsH 3 and K 2 O are the only ionic compounds. Which systematic name is incorrectly matched with the given formula? SO 2 ; dioxygen sulfide NH 3 ; trihydrogen nitride (only ever referred to as ammonia) CO 2 ; carbon dioxide H 2 O; dihydrogen oxide P 2 O 5 ; diphosphorus pentoxide Which of the following is named correctly? BaCl 2 • 6H 2 O; barium chloride pentahydrate NaClO; sodium chlorite NaC 2 H 3 O 2 ; sodium acetate KNO 2 ; potassium nitrate Li 2 SO 3 ; lithium sulfate Which of the following is incorrectly named according to the rules for binary 7/16/14, 3:31 PM Additional Practice Questions Page 11 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html molecular compounds? SbCl 3 ; antimony trichloride CF 4 ; carbon tetrafluoride C 2 O 5 ; dicarbon pentoxide NO 2 ; nitrogen dioxide H 3 As; hydrogen arsenide Which of the following statements is incorrect? Saltpeter, KNO 3 , is really potassium nitrate. Soda ash, Na 2 CO 3 , is really sodium carbonite. Lime, CaO, is really calcium oxide. Muriatic acid, HCl, is really hydrochloric acid. Milk of magnesia, Mg(OH) 2 , is really magnesium hydroxide. A certain number of electrons has a total charge of approximately 1.1 " 10 !18 C. How many electrons are there? 1 2 4 7 11 An element has 17 protons, 18 electrons, and 20 neutrons. Which isotope is it? 7/16/14, 3:31 PM Additional Practice Questions Page 12 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html An element has 76 protons, 76 electrons, and 114 neutrons. Which isotope is it? How many hydrogen atoms are in Co(NH 3 ) 6 HPO 4 ? 19 6 3 18 4 How many protons and neutrons are in sulfur-31? 2 protons, 16 neutrons 16 protons, 31 neutrons 16 protons, 15 neutrons 15 protons, 16 neutrons 7/16/14, 3:31 PM Additional Practice Questions Page 13 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html What is the correct name for (NH 4 ) 2 Cr 2 O 7 ? ammonium chromate ammonium dichromate diammonium chromate diammonium dichromate diammonium dichromium heptaoxide Which ion has the wrong charge? Cs + Ba 2+ Te 2! Xe ! I ! Which of the following are positively charged ions? (i) NH 4 ; (ii) ClO 4 ; (iii) SO 4 i only ii only iii only i and ii only none of these Which of the following ionic formulas is incorrect? 7/16/14, 3:31 PM Additional Practice Questions Page 14 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html Ca(NO 2 ) 2 Li 2 CO 3 Sr 2 NO 3 (NH 4 ) 2 HPO 3 Hg 2 (HCO 3 ) 2 Which of the following is named incorrectly? CS 2 ; carbon disulfide BCl 3 ; boron trichloride SiO 2 ; silicon dioxide PCl 5 ; phosphorus hexachloride IF 7 ; iodine heptafluoride Which of the following is a metalloid? O; S; Se; Te; Po O S Se Te Po The element oxygen consists of three isotopes with masses 15.994915 amu, 16.999133 amu, and 17.99916 amu. The relative abundances of these three isotopes are 99.7587, 0.0374, and 0.2039, respectively. Calculate the average atomic mass of oxygen. 16.0 amu 7/16/14, 3:31 PM Additional Practice Questions Page 15 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html 15.999378 amu 15.9930 amu 15.9994 amu 15.9563 amu 15.994915 amu A chemist on another planet performed the Millikan oil-drop experiment and measured the following charges in his planet's unit for charge, the bot: 2.62 " 10 !13 bots; 3.93 " 10 !13 bots; 6.55 " 10 !13 bots. What is the electron's charge in bots? 1.31 " 10 !13 bots 6.55 " 10 !14 bots 2.62 " 10 !13 bots 3.93 " 10 !13 bots An 56 Fe 2+ particle contains 58 protons, 58 neutrons, and 56 electrons. 26 protons, 26 neutrons, and 26 electrons. 54 protons, 56 neutrons, and 52 electrons. 28 protons, 28 neutrons, and 26 electrons. 26 protons, 30 neutrons, and 24 electrons. How many nitrogen atoms are in CH 2 (NH 2 ) 2 ? 3 6 2 7/16/14, 3:31 PM Additional Practice Questions Page 16 of 16 http://wps.prenhall.com/esm_brown_chemistry_13_msa/242/62067/15889293.cw/index.html 1 4 Water, no matter where it is found, consists of hydrogen and oxygen combined in a 1:8 ratio by mass. This is a statement of the law of multiple proportions. the law of constant composition. the law of conservation of mass. the law of conservation of energy. none of these Which one of the following is improperly labeled? Na; alkali metal Ba; alkaline earth metal Kr; noble gas I; chalcogen F; halogen Answer choices in this exercise appear in a different order each time the page is loaded. Copyright © 1995 - 2014 Pearson Education . All rights reserved. Pearson Prentice Hall is an imprint of Pearson . Legal Notice | Privacy Policy | Permissions