) CH;CH20CH,CH3 or CH;CH,CH-CH,ОН

Which of the following molecules display hydrogen bonding? Select ALL that display hydrogen bonding. a. CH3CH2OCH3 b. H2O c. O2 d. CH3COCH3 e. HOCH2CH3

Label each molecule with the strongest intermolecular force exhibited in the pure substane.

1.) Are there any IMF’s between cyclohexane molecules and vegetable oil? What kind(s)? Given this, what would the magnitude and sign of DHMIXING be for cyclohexane dissolving in vegetable oil?   a) Are there any IMF’s forces between cyclohexane molecules and other cyclohexane molecules? What kind(s)? Given this, what would the magnitude and sign of DHSOLUTE be for cyclohexane dissolving in water?   b) Are there any intermolecular forces between vegetable oil molecules and other vegetable oil molecules? What kind(s)? Given this, what would the magnitude and sign of DHSOLVENT  be for cyclohexane dissolving in vegetable oil?   c) Why do you think cyclohexane dissolves in vegetable oil? Analyze this the way it was done in class, thinking about the three contributions to DH What do you think the magnitude and sign of DHSOLUTION would be for dissolving cyclohexane in veg. oil?  (Explain.)  Would you expect these substances to dissolve in each other? Why?

38)

It is hard to formulate drug that do lots of hydrogen bond because Hydrogen bonds are easy to be broken Peptides are famous used as a drugs because they have and well number of hydrogen bonds. Hydrogen bonds need small amount of energy to be broken Lots of hydrogen bonds restrict the interaction of the drugs with the media

Hydrogen bonding with water Draw the expanded structure of C15H11I4NO4 (Levothyroxine) molecule.  Illustrate all ways that this molecule could form hydrogen bonds with water.  Do this by drawing bent water molecules as necessary and use dashed lines (---) to show H-bonding between water and the appropriate atom in the molecule.  Be sure that it is very clear which atoms on each molecule are involved in the hydrogen bonds. Keep in mind that hydrogen bonds from water can only from to the polar parts of this molecule.  If this molecule is not capable of forming hydrogen bonds with water, fully explain why not.  Thank you!

Based on your knowledge of boiling point trends in alkanes, predict which compound has the higher boiling point, butane or 2-methylpropane (isobutane). Based on your knowledge of boiling point trends in alkanes, predict which compound has the higher boiling point, butane or 2-methylpropane (isobutane). a. isobutane would have a higher boiling point, since the greater the surface area, the higher the boiling point. b. Butane would have a higher boiling point, since the greater the surface area, the higher the boiling point. c. Butane would have a higher boiling point, since the smaller the surface area, the higher the boiling point. d. Isobutane would have a higher boiling point, since the smaller the surface area, the higher the boiling point.

(a) Which of the following molecules can hydrogen bond to another molecule like itself? (b) Which of the following molecules can hydrogen bond to water?

Explain too please