In aqueous solutions there are three forms of glucose: the D-form (36%), the E-form (64%) and a trace amount of the open-chain form. At equilibrium, the alpha and beta cyclic forms are

interconverted by way of the open chain structure. Explain (a) why the cyclic forms exist

predominately in solutions, and (b) why the E-form is more abundant than the D-form.

Why do the strengths of london (dispersion) forces generally increase with increasing molecular size? choose one: a. heavier atoms have stronger attractions for each other than lighter atoms. b. dispersion forces are all equal in magnitude; there is no size dependence. c. dispersion forces arise from the attraction between the nuclei of atoms, and larger molecules have larger nuclei. d. dispersion forces arise from dipoles caused by the electron distribution being distorted. larger molecules have more electrons and, therefore, more distortions and a bigger force. e. dispersion forces depend on distance. larger molecules are farther apart and so the forces are smaller.