Under what circumstances can weak forces such as hydrogen bonds and    van der Waals interactions play significant roles in biological systems?

90% of our body is made of water. Use a water molecule to describe the relationship among all the following polar molecules, intramolecular and intermolecular forces, hydrophilic and hydrophobic interactions.

Why do you think that most textbooks do not consider a hydrogen bond to be an example of a van der Waals force?

What is the role of van der Waals interactions in biological molecules? 25 words or less

Two students plan and carry out an investigation to determine if ionic or covalent bonds have stronger intermolecular forces. They collect the following data. C6H1206 NaCI color white white texture,grain size rough, small pieces rough, very small grains solubility in water soluble (able to dissolve) soluble (able to dissolve) melting point melts easily does not melt a. Identify the type of intramolecular bonds that are involved. b. Which substance will have the stronger intermolecular forces? c. Which properties allow you to predict the strength of the intermolecular forces? Format B I U ... >

Discuss whether the following statement is correct: “An ionic bond can, in principle, be thought of as a very polar covalent bond. Polar covalent bonds, then, fall somewhere between ionic bonds at one end of the spectrum and nonpolar covalent bonds at the other end.”

Explain the component terms of Fick’s law with biological examples.

What is the point group of the following molecule?                     A)D3h                                 B)C5v                               C)C1                                D)D2h                             E)C2h

Using collision theory, indicate which of the following statements regarding physical nature of the reactants is true: a) physical nature of reactants                               The physical nature of reactants does not influence the rate of reaction because reactions happen only on the molecular level. Solids, liquids or gases all influence the rate of reaction the same because they are all in the physical state. Solid state reactants react faster if the particle sizes are larger because reactions occur at the boundary surface with direct contact. Gaseous-state reactions are faster than liquid-state or solid-state reactions because collisions between reactants are more frequent.