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- A student draws the picture of ammonia (NH3) in the box below, left, and predicts it will be a flatmolecule with HNH bond angles of exactly 120°. Unfortunately, the student left something out. a. What did the student omit from his drawing? b. What is the actual HNH bond angle of ammonia (based on the draw g above, right)? c. Explain why water, ammonia, and methane (shown below) all have about the same bondangles (close to 109.5°) even though they have different numbers of bonds.||| = 43°F Clear O ELECTRONIC STRUCTURE AND CHEMICAL BONDING Predicting the arrangement of electron groups around the centr... Answer the questions in the table below about the shape of the chlorine pentafluoride (CIF) molecule. How many electron groups are around the central chlorine atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central chlorine atom? (You may need to use the scrollbar to see all the choices.) Explanation Check 10 (choose one) (choose one) linear bent T-shaped trigonal planar trigonal pyramidal square planar square pyramidal tetrahedral sawhorse trigonal bipyramidal octahedral Q Search 0/3 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center www.OTAPETY AccessibiUse the bond energies provided to estimate DeltaH^ rxn for the reaction below. 2Br_(2(1))+C_(2)H_(2(g))rarrC_(2)H_(2)Br_(4(1))DeltaH^rxxn=?
- Use Lewis symbols and Lewis structures to diagram the formationof PF3 from P and F atoms, showing valence-shellelectrons. (a) How many valence electrons does P have initially?(b) How many valence electrons does each F haveinitially? (c) How many valence electrons surround the P inthe PF3 molecule? (d) How many valence electrons surroundeach F in the PF3 molecule? (e) How many bonding pairs ofelectrons are in the PF3 molecule?Which of the following Lewis structures will have resonance form H | H-C | H O-H :0: H-CN: H C H || :0: 0=5=0:0 1. :0: C | O + Clear Above to the left is one of the Lewis structures of CO3²- (carbonate ion), which has two other resonance structures. Complete one of the other resonance structures by dragging bonds, charges, and electron lone pairs to their appropriate positions. Then check your answer.
- O ||| crosoft C W W Microsoft esc Microsoft 6.52.210... ~ Calculating formal charge A student proposes the following Lewis structure for the ozone (03) molecule. V :0-0-0 Assign a formal charge to each atom in the student's Lewis structure. atom central O left O ! 1 Explanation right O formal charge 2 0 U 0 Check 9,002 > a # 3 X DEC 8 $ 4 G E buty % 5 tv ♫ A 6 7 2022II. Please expand each of the following bond-line formulas to the corresponding standard Lewis structure, be sure to show all the bonds and unshared electron pairs as well as formal charges, if it applies. 0: (a) (c) O Br | Br-B-Br -N- (b) HO: NO₂ 0: blos ohsup?The bond dissociation energy, in kJ, to break 1 bond in 1 mole of CO2 molecules is Single H Bond 432 411 386 459 HUN O C C=C C=C Multiple Bonds CN 346 305 167 358 602 201 O 142 C=O 799 CEO 1072 835 C=N 615 0=0 494 C=N 887 NEN 942 **All values in kJ/mol**
- Examples: Example: H▬N▬H HIN: Examples: :F Н lone pair : -bond pair (2 e-) single bond :F: Non-Polar 8+. H :F: H:Cl: HCl:o is better represented as closer to Cl due to its greater electronegativity. Thus, HCl contains a polar covalent bond. H :0: Polar lone pair 8- :S H -S= :0: 2 bond pairs (4 e-) double bond because the bond electrons are pulled F: Pola✔nk 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 Bolling puint, 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 H-C-F: H :O: | || HIC-C-F: 1 H H H H :O: | || HIC-C-0-H F₂ boiling point ✓ (Choose one) 1 (highest) 2 34 4 (lowest) (Choose one) ✓ (Choose one) ✓ (Choose one) ✓Using Lewis symbols and Lewis structures, diagram the formationof SiCl4 from Si and Cl atoms, showing valence-shellelectrons. (a) How many valence electrons does Si have initially?(b) How many valence electrons does each Cl haveinitially? (c) How many valence electrons surround the Siin the SiCl4 molecule? (d) How many valence electrons surroundeach Cl in the SiCl4 molecule? (e) How many bondingpairs of electrons are in the SiCl4 molecule?