2 g h 1989 kj o 3 g 15o 2 g h 1423 kj o 2 g 2o g h

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2(g)H= –198.9 kJO3(g)1.5O2(g)H= –142.3 kJO2(g)2O(g)H= 495.0 kJA.–551.6 kJB.153.8 kJC.190.9 kJD.–304.1 kJE.438.4 kJ
____38.Which one of the following sets of quantum numbers isnotpermitted??
____39.What is the electronic configuration for Cr+?4d3
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Chapter 16 / Exercise 50
Chemistry: The Molecular Science
Moore/Stanitski
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____40.Which of the following species has the smallest radius?
____41.Select the element with the highest first ionization energy.A.MgB.CaC.BaD.RaE.K
____42.From the data given below, calculate the approximate enthalpy change of reaction for the reactionbelow.CH4(g) + 2O2(g)CO2(g) + 2H2O(g)bond enthalpykJ/molC–H414C–C347C=C611C–O351C=O803O–H463O=O498H–H436
Form A, Page 13 of 17
____43.Which statement best describes the formal charges on the atoms inPO43?
____44.Construct correct Lewis dot structures for the three molecules below. Determine whichcompounds, if any, have an extended octet.CF4SF4ClF3IIIIII
____45.Using VSEPR Theory, predict the electron-pair geometry, the molecular geometry, and thesmallest approximate F–Cl–F bond angle of ClF3.A.trigonal bipyramidal, T-shaped, 90B.tetrahedral, trigonal planar, 109.5C.trigonal bipyramidal, trigonal pyramidal, 109.5D.trigonal bipyramidal, trigonal planar, 120E.trigonal planar, trigonal planar, 120
Form A, Page 14 of 17
____46.Which of the following has a trigonal planar molecular geometry?I.nitrate ionII.carbonate ionIII.sulfite ionIV.selenite ion
____47.Which of the following molecules are polar?I.ICl4II.NH4+III.IF5IV. RnF2
____48.Determine the hybridization around each central atom.NH2NH3CO32–23d
Form A, Page 15 of 17
____49.Which of the following molecules are paramagnetic?B2, C2, N2, O2, F2A.B2and N2B.B2and O2C.N2and O2D.N2and F2E.C2, O2, and F2
____50.What is the bond order for NO?
Form A, Page 16 of 17____51.***Calculate the lattice energy of magnesium sulfide from the data given below:***Mg(s)Mg(g)H° = 148 kJ/molMg(g)Mg2+(g)+2eH° = 2186 kJ/molS8(s)8S(g)H° = 2232 kJ/molS(g)+2eS2–(g)H° = 450 kJ/mol8Mg(s) +S8(s)8MgS(s)H° = –2744 kJ/molMg2+(g) + S2–(g)MgS(s)H°lattice= ?

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Term
Spring
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Kerber
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Chemistry: The Molecular Science
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Chapter 16 / Exercise 50
Chemistry: The Molecular Science
Moore/Stanitski
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