U STEP 2 Determine Your Test Readiness in C#.NET

Scanner Data Matrix in C#.NET U STEP 2 Determine Your Test Readiness

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31 Which of the following groups contains only atoms that are paramagnetic in their ground state (A) (B) (C) (D) (E) Be, O, and N Mg, He, and Rb K, C, and Fe Br, Sb, and Kr S, Zn, and F

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41 VSEPR predicts that an IF5 molecule will be which of the following shapes (A) (B) (C) (D) (E) tetrahedral trigonal bipyramidal square pyramid trigonal planar square planar

The following ground-state electron configurations are to be used for questions 32 35: (A) (B) (C) (D) (E)

2 6 2 3 1s 1p 2s 2p 2 2 6 2 6 2 10 6 2 1s 2s 2p 3s 3p 4s d 4p 5s 2 2 6 2 6 3 1s 2s 2p 3s 3p 3d 1s22s22p5 1s22s22p63s23p64s23d104p6

42 Which of the following does not have one or more bonds (A) (B) (C) (D) (E) SO2 SF6 O2 SO3 O3 IF5 BrF3 CF4 SF4 OF2

32 This is the configuration of a transition metal ion 33 This is the configuration of a noble gas 34 The halogen in this group 35 This is an impossible electron configuration The following answers are to be used for questions 36 39: (A) (B) (C) (D) (E) Pauli exclusion principle electron shielding the wave properties of matter Heisenberg uncertainty principle Hund s rule

43 Which of the following is nonpolar (A) (B) (C) (D) (E)

44 The only substance listed below that contains ionic, , and bonds is: (A) (B) (C) (D) (E) Na3N NO2 NaNO3 NH3 HNO3

45 Which molecule or ion in the following list has the greatest number of unshared electron pairs around the central atom (A) (B) (C) (D) (E) SO2 CO32 XeF2 CF4 H2O 51 The critical point on a phase diagram represents (A) the highest temperature and pressure where a substance can sublime (B) the highest temperature and pressure where the substance may exist as discrete solid and gas phases (C) the temperature and pressure where the substance exists in equilibrium as solid, liquid, and gas phases (D) the highest temperature and pressure where the substance may exist as discrete liquid and gas phases (E) the highest temperature and pressure where the substance may exist as discrete liquid and solid phases Choose the appropriate answer from the following list for questions 52 and 53 (A) (B) (C) (D) (E) London dispersion forces covalent bonding hydrogen bonding metallic bonding ionic bonding

46 What types of hybridization of carbon are in the compound acetic acid, CH3COOH I sp II sp2 III sp (A) (B) (C) (D) (E) I, II, and III I only I and II II and III II only

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Choose from the following descriptions of solids for questions 47 50 (A) composed of atoms held together by delocalized electrons (B) composed of molecules held together by intermolecular dipole dipole interactions (C) composed of positive and negative ions held together by electrostatic attractions (D) composed of macromolecules held together by strong bonds (E) composed of molecules held together by intermolecular London forces 47 Graphite 48 Ca(s) 49 CaCO3(s) 50 SO2(s)

52 This is why copper is ductile 53 This is why acetic acid molecules exist as dimers in the gaseous phase 54 For the following, pick the answer that most likely represents their relative solubilities in water (A) CH3CH2CH2OH < HOCH2CH2OH < CH3CH2CH2CH3 (B) CH3CH2CH2CH3 < HOCH2CH2OH < CH3CH2CH2OH (C) CH3CH2CH2CH3 < CH3CH2CH2OH < HOCH2CH2OH (D) CH3CH2CH2OH < CH3CH2CH2CH3 < HOCH2CH2OH (E) HOCH2CH2OH < CH3CH2CH2OH < CH3CH2CH2CH3

58 A solution of pentane, C5H12, in carbon tetrachloride, CCl4, is nearly ideal The vapor pressure of pentane is 450 mm Hg at 20 C, and the vapor pressure of carbon tetrachloride is 87 mm Hg at this temperature What is the mole fraction of carbon tetrachloride in the vapor over an equimolar solution of these two liquids (A) (B) (C) (D) (E) 016 084 019 087 050