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1 Assignment Preview Course: Chem113, Fall 2004 Dates: Available: Thu Jul :09 PM EST Due: Sun Nov :09 PM EST Close this window practice test 3 About this assignment practice test 3 practice test 3 1. ZumChem5 5.AE.102. [224665] Acetylene gas, C 2 H 2 (g), can be produced by reacting solid calcium carbide, CaC 2, with water. The products are acetylene and calcium hydroxide. What volume of wet acetylene is collected at 25 C and 717 torr when 5.60 g calcium carbide is reacted with an excess of water? (At 25 C the vapor pressure of water is 23.8 torr.) L 2. ZumChem5 5.E.061. [224707] A piece of solid carbon dioxide, with a mass of 8.4 g, is placed in a 4.0 L otherwise empty container at 24 C. What is the pressure in the container after all the carbon dioxide vaporizes? atm If 8.4 g solid carbon dioxide were placed in the same container but it already contained air at 740 torr, what would be the partial pressure of carbon dioxide, P CO2? atm What would be the total pressure, P total, in the container after the carbon dioxide vaporized? atm 3. ZumChem5 8.CP.120. [224840] Which of the following molecules have dipole moments? (Select all that apply.) (a) (b) (c) CH 2 Cl 2 CCl 4 CHCl 3 CO 2 N 2 O PH 3 NH 3 For the molecules that are polar, indicate the polarity of each bond and the direction of the net dipole moment of the molecule. (Do this on paper. Your instructor may ask you to turn in this work.) 1 of 8 7/12/2004 3:48 PM
2 4. ZumChem5 9.E.016. [190176] Give the expected of the central atom for the following molecules or ions. (Type your answer using the format 2 for 2.) (a) SO 4 2- (b) PO 4 3- (c) XeO 4 (d) ClO2 - (e) O 3 (f) SO 3 (g) SO 2 5. ZumChem5 9.E.024. [189313] For each of the following molecules or ions that contain sulfur, predict the molecular structure about each sulfur (including ), and give the expected hybrid orbitals for sulfur. (Select all that apply.) (c) (a) SO 4 2- trigonal bipyramid 2 3 d 3 (b) SO 2 trigonal bipyramid 2 3 d 3 trigonal bipyramid of 8 7/12/2004 3:48 PM
3 d 2 3 d 2 3 d 3 d 2 3 (d) SF 2 (e) SF 6 (f) F 3 S-SF trigonal bipyramid 2 3 d 3 d 2 3 trigonal bipyramid 2 3 d 3 d 2 3 trigonal bipyramid 2 3 d 3 d 2 3 Write the Lewis structure(s) for each molecule or ion. (Do this on paper. Your instructor may ask you to turn in this work.) 6. ZumChem5 9.E.028. [227668] Many important compounds in the chemical industry are derivatives of ethylene (C 2 H 4 ). Two of them are acrylonitrile and methyl methacrylate. 3 of 8 7/12/2004 3:48 PM
4 Complete the Lewis structures, showing all lone pairs. (Do this on paper. Your instructor may ask you to turn in this work.) Give approximate values for a through f. (a) (b) (c) (d) (e) (f) Give the of all carbon atoms. (Type your answer using the format 2 for 2.) acrylonitrile double-bonded carbons triple-bonded carbon methyl methacrylate double-bonded carbons carbon double bonded to oxygen methyl carbons In acrylonitrile, how many of the atoms in the molecule lie in the same plane? How many bonds and how many bonds are there in methyl methacrylate and acrylonitrile? methyl methacrylate bonds bonds acrylonitrile bonds bonds 7. ZumChem5 9.E.037. [227672] Using the molecular orbital model, write electron configurations for the following diatomic ecies and calculate the s, BO (enter 1/2 as 0.5). How many unpaired 4 of 8 7/12/2004 3:48 PM
5 electrons are present in each one? (Type your answers in the format (S2s)2(S2s*)2(P2p)4(S2p)2 for ( 2s ) 2 ( 2s*) 2 ( 2p) 4 ( 2p ) 2 where S stands for and P stands for.) O 2 + configuration unpaired electrons O 2 configuration unpaired electrons O 2 - configuration unpaired electrons O 2 2- configuration unpaired electrons 8. ZumChem5 9.E.042. [227674] Using the molecular orbital model, write electron configurations for the following diatomic ecies and calculate the s. Which ones are paramagnetic? (a) NO + electron configuration 2p) 4 ( 2p ) 2 2p) 4 ( 2p ) 2 ( 2p*) 1 (b) NO electron configuration 2p) 4 ( 2p ) 2 2p) 4 ( 2p ) 2 ( 2p*) 1 (c) NO - electron configuration 2p) 4 ( 2p ) 2 2p) 4 ( 2p ) 2 ( 2p*) 1 5 of 8 7/12/2004 3:48 PM
6 2p) 4 ( 2p ) 2 ( 2p*) 2 paramagnetic or diamagnetic? paramagenetic diamagnetic 2p) 4 ( 2p ) 2 ( 2p*) 2 paramagnetic or diamagnetic? paramagenetic diamagnetic 2p) 4 ( 2p ) 2 ( 2p*) 2 paramagnetic or diamagnetic? paramagenetic diamagnetic 9. ZumChem5 9.E.049. [92521] Describe the bonding in the O 3 molecule and the NO 2 - ion using the localized electron model. How would the molecular orbital model describe the bonding in these two ecies? 10. ZumChem5 22.E.041. [224256] Identify each of the following compounds as a carboxylic acid, ester, ketone, aldehyde, or amine. 6 of 8 7/12/2004 3:48 PM
7 11. ZumChem5 22.E.022. [224251] Name each of the following alkenes or alkynes. 12. ZumChem5 22.E.020. [224250] Name each of the following cyclic alkanes, and indicate the formula of the compound. name formula (Type your answer using the format CH4 for CH 4.) name 7 of 8 7/12/2004 3:48 PM
8 formula name formula 13. ZumChem5 22.E.019. [224249] Name each of the following. Submit for Testing Preview Tools Show All In View: Hide All Hidden: Score Mark Help/Hints Key Solution Show new Randomization Print page 8 of 8 7/12/2004 3:48 PM
Previewer Tools Show All Description practice test 3
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