The structure of hydrogen sulphide (Mr = 34.1 g mol-1 ) is analogous to water (Mr = 18.0g
mol-1
). Despite having larger molecular mass than water, the boiling point of hydrogen

sulphide at STP is -60.2°C whereas the boiling point of water is 99.61 °C under the same

condition. Explain this observation.

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.