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- Consider the following flat drawing of methane (CH4) . a. What is HCH bond angle implied by this drawing if you assume it is flat? b. Are the electron domains of this flat CH4 spread out as much as possible? c. Use model materials to make a model of CH4 (methane). If you assembled it correctly, thefour bonds (bonding electron domains) of your model will be 109.5° apart. d. In which representation, the drawing above or the model in your hand (circle one) are theH’s of CH4 more spread out around the central carbon? e. Confirm that your model looks like the following drawing. The wedgebond represents a bond coming out of the page, and the dash bondrepresents a bond going into the page f. You will often see methane drawn as if it were flat (like on the previous page). Why is thismisleading, and what is left to the viewer’s imagination when looking at such a drawing?Use the Lewis dot structure (make sure you show all electron pairs) to predict the electronic geometry_(EG) and the shape of the molecule H2O. O EG - bent; shape - bent O EG - trigonal planar; shape lincar O EG- tetrahedral; shape - bent O EG - tetrahcdral; shape trigonal pyramidal O EG - trigonal bipyramidal; shape - tetrahedralgeNSUIortheastern St OWLv2 LOnline teaching. Chemistry Questions eA. vLAShort Paner: Alcohol/Foo. Centent O X Screenshot 2020-11-15 at 11.03.... O O Q Q ĮKererencesĮ a. Predict the molecular structure and bond angles for SeCle. Approximate bond angles are sufficient. Molecular Structure = Bond Angles b. Predict the molecular structure and bond angles for IC15. Approximate bond angles are sufficient. Molecular Structure = Bond Angles linear bent Try A 3 item attempts remaining ubmit Answer trigonal planar T-shaped trigonal pyramidal tetrahedral square pyramidal square planar octahedral 11:04
- Number of Molecule valence electrons Formal Charge Electron-Group Geometry Molecular Geometry Resonance AIH2ATCI- Al: Al: Select one.. Al: Select one .. Select one ... AIHAT,Br Al: Al: Select one ... Al: Select one ... Select one ... FSIAS Si: Si: Select one .. Si: Select one ... Select one .. PHATCI P: P: Select one ... P: Select one.. Select one .. PCIFI P: P: Select one ... P: Select one ... Select one ... v1. How many valence electrons in each of the following: C Br N Cl- DRAWING LEWIS STRUCTURES 2. Complete the Lewis structure for CH,0H: 1. Identify how many total valence électrons are in your How many H. molecule valence e- 2. Arrange the atoms in the expected bonding order A H C O H does each atom bring in? 3. Arrange the electrons to that two electrons are in each bond 3. Draw the Lewis structures for the following: and, as much as possible, all valence shells are filled. Use CH,NH2 F2 lone pairs as needed and FOLLOW the OCTET RULE!!!!If present, do the # of bonding # of lone Molecular electron How many bonds have a Is this molecule Electron dipoles cancel Steric # Geometry pairs Geometry polar? dipole? each other? groups Choose... Choose... N2 N/A N/A N/A Choos Choos N/A N/A Choose... Choose... Choose... Choose... Choos Choos Choos Choos HCN Choose... Choose... Choose... Choose... Choos Choos Choos Choos H30* Choose... Choose... Choos Choos 12 N/A N/A N/A N/A N/A Choose... Choose... Choose... Choose... Choos Choos Choos Choos NH4 Choose... Choose... Choose... Choose... CH20 Choos - Choos Choos Choos
- Molecule/Ion: Cl2CF3I find # valence electrons;Lewis Structure; Electron Domain Geometry;Molecular Geometry;Predicted Angle/s;Measured Angles;Justification for agreement or deviation?4. C/ 4 8:4 EG:tetrahedre NB:0 MGitetnatedrel EG: tetralleira 0:2 MG bent NB: 2 4 central (CH₂CH₂) polar or nonpolar? Explain. Potor, because Chorine has by higher electrones & Niets St then hydrogeme which results alim in uneque palling palling ond since it's also not symmetrica. atom? How many "central" atoms are part of methanol (CH3OH)? What are the molecular geometries of each central 2 Centro otorns H-0₁- atoms H B: 2 - NB: 2 MG bert I-N - 5. How many "central" atoms are part of ethylene glycol (HOCH₂CH₂OH), a component of antifreeze? What are the molecular geometries of each central atom? Is the molecule polar or nonpolar? Why? (Note: the modeling kits technically only contain one carbon and one oxygen via color coding, however, in this example, other spheres can be used to represent these elements within this molecule why?) 4 I U-I ... Or Ch 9-12 EG: tetrahedro B:4 66% terrehend NB:0 MG: teaters PIs this a reasonable structure? If not, why not? molecule proposed Lewis structure O Yes, it's a reasonable structure. :F : O No, the total number of valence electrons is wrong. CIF 3 The correct number is:U .. .. : F Cl F: O No, some atoms have the wrong number of electrons around them. - The symbols of the problem atoms are: U O Yes, it's a reasonable structure. :0: No, the total number of valence electrons is wrong. .. .. XeO4 :0 - Xe -0: The correct number is:U No, some atoms have the wrong number of electrons around them. :0: The symbols of the problem atoms are: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. I, The correct number is: U No, some atoms have the wrong number of electrons around them. O :Please note that "geometry" refers to the molecular or ionic geometry. :0: A. The Lewis diagram for PO2(OH), is: 0-H -P. :0: The electron-pair geometry around the P atom in PO2(OH)2 is There are lone pair(s) around the central atom, so the geometry of PO2(OH)2 is .. B. The Lewis diagram for CO2 is: 0=c=0 Recall that for predicting geometry, double and triple bonds count as only one electron pair. The electron-pair geometry around the C atom in CO, is There are lone pair(s) around the central atom, so the geometry of CO, isNumber of Molecule valence electrons Formal Charge Electron-Group Geometry Molecular Geometry Resonance BH3B" B: B: Select one ... B: Select one ... Select one . SbAt2Br Sb: Sb: Select one ... Sb: Select one .. Select one BCI4 B: B: Select one.. B: Select one .. Select one .. V NBr3F* N: N: Select one.. N: Select one ... Select one . AIHCI3 Al: Al:Select one ... Al: Select one . Select one .13. Which of the following incorrectly describes the molecular shape around the indicated central atom?L a. trigonal planar O:0H vo boanolen ei tesH b. tetrahedral ainatanS o nach ons c. trigonal planar ps buoqncra snefome -c=c-S-H .. d. linear e. bent H. 14. Which of the following molecules is nonpolar? 30 Cou a. a. CH3CI 332 1 b. CS2 P00 с. NH3 d. CH3OH ST COSEE MORE QUESTIONS
