homework_5 - Grodin Micah Homework 5 Due 11:00 pm Inst Sara...

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Unformatted text preview: Grodin, Micah Homework 5 Due: Oct 11 2005, 11:00 pm Inst: Sara Sutcliffe This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Name the compound NiO. 1. nickel oxygenate 2. nickel monoxide 3. nickel(I) oxide 4. nickel oxide 5. nickel(II) oxide 002 (part 1 of 1) 10 points Choose that pair of names and formulas that do not match. 1. Fe2 (SO4 )3 : iron(III) sulfate 2. MnCO3 : manganese(II) carbonate 3. SnO : tin(II) oxide 4. SnCl4 : tin(IV) chloride 5. Cu2 O : copper(II) oxide 003 (part 1 of 1) 10 points How many sodium atoms are in one formula unit of sodium nitrate? 1. 5 atoms 2. 2 atoms 1 Which one of the following has the LOWEST electronegativity? 1. chlorine 2. oxygen 3. fluorine 4. sodium 005 (part 1 of 1) 10 points Moving down a column in the periodic table, the electronegativity generally 1. increases, then decreases. 2. decreases, then increases. 3. decreases. 4. increases. 5. stays the same. 006 (part 1 of 1) 10 points Use electron-dot notation to demonstrate the formation of an ionic compound involving the elements Na and S. 1. Na + 5. 1 atom 004 (part 1 of 1) 10 points 4. Na + Na + S - 4. 4 atoms Na +Na + S + S + S 3+ 3+ 2- 2- 2- Na2 S3 3. 3 atoms 3. Na + Na + S + S + S Na + S 3+ 2. Na + S - 3- Na + S + S 2+ - S + S - - - NaS2 - NaS - - Grodin, Micah Homework 5 Due: Oct 11 2005, 11:00 pm Inst: Sara Sutcliffe S ! ! !! !! 2 Na+ + Na+ + $ # " - - Na3 S S 1 33 1 11 1 - Na3 S2 10. None of these 007 (part 1 of 1) 10 points When a fluorine atom reacts with a chlorine atom, the bond that forms between them should be 1. ionic-covalent. 2. polar covalent. 3. ionic. 4. nonpolar covalent. 008 (part 1 of 1) 10 points Which of the following is the correct Lewis formula for nitrogen trichloride (NCl3 )? 7. Cl V V Cl Cl N N XX W W 9. Cl N Cl ` 009 (part 1 of 1) 10 points Which of the following is the correct Lewis formula for formaldehyde (CH2 O)? ` Cl ` ` ` ` ` ` ` ` I` 10. Cl ` N Cl ` ` ` Y Cl X X Cl Cl XX 8. Y U U Y Y ` I` ` F F Na + S - NaS UU FF FF 2+ 2- Cl UU S IS S - F F S E 9. Na + D S 6. Cl N T Cl T T T S IS C C B B EE E EE A A Na + S D + S + S CC CC BB BB - AA - - - Na2 S3 R R AA 3+ R Cl R R R @ C C 9 B B 8 8. Na + A A 7 S + S + S - 5. Cl N Q Q S @ @ 6 6 @@ R IR @@ 66 66 Na+ + 99 9 9 99 88 8 8 88 7 7 - - NaS Q Cl Q Cl Q Q Q Q Q IQ 6 6 5 7. Na + S - 4. Cl Q Cl Q N Cl Q Q Q P Cl P P Q IQ P P P P P Q IQ Q 3 3 2 2 Na + Na + Na + S + S 3. P 33 22 22 2+ 2+ 2+ 3- 3- Cl N Cl P P P 3 3 0 0 6. Na + Na + Na + 2 2 ) ( ' S + - H Cl H H H H H H H 00 0 & & Na + Na + Na + ) ( ' S 2. H Cl N Cl H && && + + + 3- H H H IH G G % % 5. Na + Na + Na + & & S G Cl G G G %% % ! ! 2- - Na2 S 1. Cl N Cl 55 5 5 55 4 Grodin, Micah Homework 5 Due: Oct 11 2005, 11:00 pm Inst: Sara Sutcliffe a a 3 2. H b b C b H c c b b 3. H C H 4. H H O C d ed C O d d 6. H f f C f H C g f f g eg H g g g 010 (part 1 of 1) 10 points Which of the following does NOT exhibit resonance? t H t t t t t t t t It 10. t H t C O t t t s s H ss ss q Iq t It q q 9. H C r O p p r pp H r r H pp 8. O C g g i i g g h h g Ig 7. g H g O g g g d H d d f ef d O 012 (part 1 of 1) 10 points By what could a 300 nm photon be absorbed? f d d 5. d d c O c a H a a a O b a a a d a d g Ig q Iq g t 1. H a H C O 1. All of the other answers have ions or molecules which exhibit resonance. a 2. CO2- 3 3. SO3 4. NO- 3 5. SO2- 3 011 (part 1 of 1) 10 points Which one of the following compounds does NOT obey the octet rule? 1. H2 O 2. SF6 3. NH3 4. CH4 1. O3 but not O2 2. O2 but not O3 3. either O2 or O3 4. neither O2 nor O3 013 (part 1 of 1) 10 points Which has the shortest wavelength? 1. UV-C 2. UV-B 3. UV-A 4. All have equal wavelengths 014 (part 1 of 1) 10 points Which of Grodin, Micah Homework 5 Due: Oct 11 2005, 11:00 pm Inst: Sara Sutcliffe I) Ozone reacts with oxygen atoms to form oxygen molecules; II) Ozone is removed by its reaction with water vapor; III) Ozone is removed by an interaction with UV radiation causing it to dissociate into an oxygen molecule and an oxygen atom. is/are part(s) of the Chapman cycle in the stratosphere? 1. I only 2. None of these 3. I and II only 4. I and III only 5. II only 6. All of these 7. II and III only 8. III only 015 (part 1 of 1) 10 points Lewis dot structures provide a simple rationalization for the fact that O3 absorbs light of larger wavelengths than O2 . The rationalization is that 1. O3 is a radical. 2. resonance structures show that O3 has one and a half bonds between each pair of atoms whereas O2 is double bonded. 3. O3 is found higher up in the atmosphere where there is more UV light. 4. O3 is a cyclic molecule. 5. O3 vibrational frequencies are lower, making it easier to dissociate the molecule with light. 4 ...
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