For each pair of compounds, select the compound that would be more soluble in water. Explain your answer briefly. You may refer to the following electronegativity values.     F= 4.0; I=2.4; N= 3.0; O=3.5; H=2.1; As=2.0; S=2.5 a. C2H5F and C2H5I b. C3H7OH and C3H7SH c. NH3 and AsH3

Change ethane into 1,2-ethanediol (HOCH2CH2OH) by removing one hydrogen atom from each carbon atom and replacing with a hydroxide (-OH) group.   Draw a Lewis structure for 1,2-ethanediol.

Using your general knowledge of periodic trends in electronegativity, predict whether the C=O bond and the C-H bonds in formaldehyde will be strongly polar, weakly polar or nonpolar.  Calculate the electronegativity difference ΔχO-C across the C=O bond and the electronegativity difference ΔχC-H to confirm or correct your predictions. For any strongly polar bond(s) on the molecule, draw the bond dipole moment adjacent to the bond in the VSEPR structure above, using crossed arrow notation to show the direction of the positive and negative bond dipoles.  Predict whether the overall molecule should be polar or nonpolar. ___________________ Explain your reasoning below. If the overall molecule is polar, draw the net dipole next to the molecule, using crossed arrow notation to indicate the direction of the dipole.

Calculate the Enthalpy Change (ΔH) from average bond energies, which have been listed below in KJ/mol, for the following reaction and identify the nature of the reaction: CH3COOH + CH3OH → CH3COOCH3 + H2O [C‒H: 413; C‒C: 347; C=O: 745; C=C: 614; Cl‒Cl: 239, C‒O: 358; O‒H: 467]

A 0.04336 g sample of gas occupies 10.0 mL at 293.5 K and 1.10 atm. Upon further analysis, the compound is found to be 25.305% C and 74.695% Cl. What is the molecular formula of the compound? molecular formula: Draw Lewis structure

Why does styrene have a higher boiling point, 145 °C, than isopropanol, 83 °C? Explain your answer by indicating the types and relative strengths of intermolecular forces present in each compound (see the line structures given below). HO styrene dipole moment = 0.13 D isopropanol dipole moment = 1.66 D

One family of disinfection byproducts that result from the reaction of chloramines with natural organic matter in water are called the halomethanes. These are molecules where the hydrogen atoms in methane (CH4) have been replaced with atoms from group 7 of the periodic table (i.e. halogens). Draw and submit pictures of the Lewis structures for each of the following halomethanes:   CH3Cl   CCI   CBrCiz

Give one possibility for the mystery reactant R in this organic reaction: R+ H₂ Ni - No reaction. CH3 CH2CH3 Specifically, in the drawing area below draw the condensed structure of what R might be. There may be more than one correct answer. Note: keep in mind that the equation above states R and H₂ are present in a 1:1 mole ratio. Click anywhere to draw the first atom of your structure. X Ś 2

Draw the Lewis structure of acetic acid, CH3CO2H, clearly indicating all non-bonding pairs of electrons. Even though nitrogen and phosphorus have the same number of valence electrons, nitrogen can only bond to chlorine four times forming NCl4+ but phosphorus can bond with chlorine five times forming PCl5. Explain. Draw all the isomers of C4H9Br, using bond-line formulas. Draw the Lewis structure of the nitrite ion, NO2–, clearly indicating resonance contributors as well as non-bonding pairs of electrons and formal charges, as relevant. Nitromethane is a polar molecule but contains 2 equal polar covalent bonds. Briefly explain why and draw a relevant 3-dimensional structure to show the overall dipole moment of the molecule. Draw all isomers of C6H12O that are aldehydes.

The structure of a vitamin is shown below. H HH H. нн C C-H нн н о H a) Write the line structure for this vitamin adding all the lone pairs to your structure b) Identify the functional groups in the vitamin c) Identify three polar covalent bonds (involving different pairs of elements) in the structure and draw the partial charges on the atoms involved. d) Identify two potentially nucleophilic atoms and two potentially electrophilic atoms in your structure, giving a very brief explanation in each case. 2.