Determine the electron pair geometry (EPG), the molecular geometry (MG), the bong angle (BA), and the polarity of BrF5. NOTE: Be sure to enter in your answers with correct spelling, spacing, and all lowercase letters; for the bond angle just type in the number; for the polarity enter "yes" for polar and "no" for nonpolar. ЕPG: MG: BA: polar? enter yes or no:

How many valence electrons are in the methanol molecule CH₂OH? 0 X G

Draw the 2D and the 3D Lewis structure for each molecule. You do not need to show resonance structures here. Determine the electron pair geometry (EPG), the molecular geometry (MG), the bond angle (BA) around the central atom, and the hybridization of the central or bold atom. Circle the formula of any polar molecule. For molecules with more than one central atom (e.g. CHCH20H) give the structure around the bold atom.

Imagine you are a CHML 201 instructor. One of your students asks “Why is water, H2O, a bent molecule (in other words, why is water’s molecular shape bent with an angle of ~105o)? Why isn’t water a linear molecule?” Answer the student’s question clearly, completely, and in detail – starting from the electronic structure of H and O atoms. A Periodic Table and a Table of Electronegativity values are given above.

Draw the 2D and the 3D Lewis structure for each molecule. You do not need to show resonance structures here. Determine the electron pair geometry (EPG), the molecular geometry (MG), the bond angle (BA) around the central atom, and the hybridization of the central or bold atom. Circle the formula of any polar molecule. For molecules with more than one central atom (e.g. CH,CH,0H) give the structure around the bold atom. Molecule ЕPG Hyb (circle if polar) 2D Lewis Structure 3D Lewis Structure MG ВА CH,S GeO2 CF4

Give the Lewis Dot Structures, then draw the structures with the correct molecular geometry and give the name for the molecular geometry. Determine the polarity of the molecules and ions. POCl3 AsO4^3- BF3 OCN- XeF4S OF4

For each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. compound hydrogen-bonding force Between Between molecules of formula or Lewis the compound and molecules of water? name molecules of the structure compound? H :0: yes yes acetic acid н —с —с-о —н | no no H H yes yes methanimine H – c=N– H no no yes yes hydrogen bromide H Br no no

Predicting deviations from ideal bond angles Consider the carbonate (co-). anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the carbon-oxygen bonds? Compared to the ideal angle, you would expect the actual angle between the carbon-oxygen bonds to be ... 0 口。 (choose one) (choose one) about the same bigger smaller