The apparatus below is a glass tube with two cotton balls stuck in the ends. One cotton ball is soaked with an aqueous solution of HX while the other cotton ball is soaked with a volatile base. When HX and the base meet a white solid is produced and creates a vertical ring in the tube. In the following situations, determine if the white ring will form closer to HX, closer to the base, or near the middle. In each case, explain your reasoning. HX: HCl Base: CH3NH2
HX: HBr Base: CH3NH2
HX: HCl Base: CH3(CH2)6N H2

How does the digestive system interact with the circulatory system? a. messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system. b. nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system. c. nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system. d. oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.