The electric attractions and repulsions of the ions on the surface of complex molecules play a critical role in many biochemical reactions. An interesting component of some of these processes is that chemical reactions or electron transfers result in a change of the shape of a molecule, exchanging chemical energy for electrical energy, and resulting in a different surface configuration and therefore different interactions. In this problem we will explore the effect of a change of configuration of a molecule on the force between it and an ion in a neighboring molecule. Consider the electric force between four ions on the surface of two large molecules as shown in the gure at the right. The heavy black lines running out of the frame indicate bonds to other atoms in the molecule that we will not consider here. The purple ion in the molecule on the right has a charge +2, the red ion in the molecule on the left has a charge Ze, and the two green molecules in the molecule on the left each have charges +e. A schematic diagram of these ions is shown below indicating relative distances. (a) Consider the following image. Qualitatively (without doing a calculation), would you expect the force of the ions (ABC) on ion D to be attractive or repulsive? Incorrect The force of the ions (ABC) on ion D is repulsive. Correct: The force of the ions (ABC) on ion D is attractive. You are correct. Your receipt no. is 164-8233 9 m (b) Now do the calculation to nd the net force between (ABC) and D. Express your result as a multiple of the combination SubmitAnswer Dawning. Tries 1/99 Previous Tries