4. How does C-C, C-H, and C-O bonds compare to a chemistry where C is replaced by Si? A) C-C, C-H, and C-O bonds have about the same strength as C-H and C-O bonds, whereas Si-H and Si-O have a notably greater strength than Si-Si bonds B) C-C, C-H, and C-O bonds have about the same strength as Si-Si bonds, and Si can form rings C) C-C, C-H, and C-O bonds have about the same strength as Si-Si bonds, but Si cannot form rings D) C-C, C-H, and C-O bonds have about the same strength as Si-Si bonds, but Si cannot form rings and it is furthermore unable to form multiple bonds

For the following 3 molecule / ions, XO3-, (X is a hyper-valent element in 5A group) IF 03 1) calculate the total number of valence electrons (show your work) 2) draw the Lewis Structure; if resonance exists, draw the resonance structures. 3) determine # electron domains, and # lone electron pairs on the central atoms 4) determine electron-pair geometry, molecular geometry (shape), hybrodization of the central atom. 5) determine bond angle, molecular polarity.

[Review Topics] [References] This question has multiple parts. Work all the parts to get the most points. a Estimate the value of AH° for the following reaction from bond enthalpies using the data below. H2 (9) + F2 (9) 2HF(g) Bond Enthalpies (in kJ/mol) Single Bonds F H 436 567 159 ΔΗ' kJ Submit Retry Entire Group 9 more group attempts remaining Submit Answer W 人国 DEC 3 étv MacBook Air DII DD 000

H3C N(CH3)2 Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Temp toolbars. The single bond is active by default. DDC H2D EXP. CONT. 3 [1] A H₂C NH™ H C N O S CI Br I P F LL