Some chemical and structural features of molecules are unaccounted for by valence bond theory. Recognizing how molecular orbital theory describes these systems will lead to a better understanding of these molecules' physical properties and reactivity. 1st attempt Draw an additional resonace struture for the cation shown: ཡི "。 12D + See Periodic Table See Hint

If heat of atomization of PCl5 is x kJ mol-1 then average bond dissociation enthalpy P-Cl bond is

Calculate the enthalpy of formation, AHF° in kJ, of hydrogen peroxide, H2O2(g), from the relevant bond energy data. Bond Bond energy Bond Bond energy O-H 463 kJ mol-1 H-H 436 kJ mol-1 O=O 498 kJ mol-1 O-O 138 kJ mol-1 -285 +285 +130 -380 -130

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D chemical symbol, chemical formula or Lewis structure H :0: I | H H-C-C-0-C-H F₂ H :O: ||| : 0: H H 1 .. H H 1 HIC-C-N-C-H H H :NEN 0: boiling point (Choose one) ✓ (Choose one) ✓ (Choose one) (Choose one) X

What are the formal charges on the sulfur (S), carbon (C), and nitrogen (N) atoms, respectively, in the "best" or most realistic Lewis structure shown below? The possible Lewis structures for the thiocyanate ion, SCN, are S=c=N] $-c=Ñ]' [:s=C-N;T Structure A Structure B Structure C Express your answers as integers separated by commas. • View Available Hint(s) formal charge on sulfur (S), carbon (C) and nitrogen (N) atoms = Submit

Cesium Chloride: Equilibrium Distance 1 point possible (graded) Physical constants that you may need: Elementary Charge e = 1.60218 × 10-19 C Vacuum Permittivity ε0 = 8.85419 × 10-12 C2 Jm Cesium is the most reactive metal in the periodic table. It reacts vigorously with molecular compounds such as water or chlorine gas to produce ionic compounds. The dissociation energy of gaseous cesium chloride into neutral atoms is AEd = 439 kJ/mol. CsCl (g) → Cs (g) + Cl (g) AE = AEd Potential Energy Interatomic distance r k] AEd = 439 mol Estimate the equilibrium distance re in gaseous cesium chloride. Report the value in picometers. lonization energy of cesium: 375.5 k.J mol Electron affinity of chlorine: 348.7 kJ mol pm Submit You have used 0 of 10 attempts Save

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D H chemical symbol, chemical formula or Lewis structure H :0: 44 - C- C-H H - H 1 C I Ar H H | | - C - | 1 H H H Ag H CIO : 0: H boiling point ✓ (Choose one) 1 (highest) 2 3 4 (lowest) (Choose one) ✓ (Choose one) ✓

16522631&OpenVellumHMAC=250253b32e9565151f3a112a4880967e#10001 I Review Constants Periodic Table ving reactions. Part A | 1. CH3O 2. HCI CH;CH2CH2 OCH3 Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default. CONT. 12D H | +) X) EXP H. C N.

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on.

stion 7 of 41 > Use the molar bond enthalpy data in the table to estimate the value of AHan for the equation Average molar bond enthalpies. (Hpond) Bond kJ. mol- Bond kJ . mol- CCI,(g) + 2 F,(g) → CF,(g) + 2C,(g) O-H 464 C=N 890 The bonding in the molecules is shown. 0-0 142 N-H 390 С-о 351 N-N 159 +に+章 F-F C-CI O=0 502 N=N 418 CH C=0 730 N=N 945 F-F C-CI С-С 347 F-F 155 C=C 615 Cl–CI 243 C=C 811 Br-Br 192 С-Н 414 H-H 435 С-F 439 Н-F 565 C-CI 331 H-Cl 431 С-Br 276 Н-Br 368 С-N 293 H-S 364 C=N 615 S-S 225 AHn = kJ Question Source: McQuarrie, Rock, And Gallogly 4e - General Chemsitry| Publisher: University Science Books S A «tv MacBook Air 80 DII DD F3 F8 F10 F11 F12 F4 F5 F6 F7 F9