Question

determine whether each statement is true or false. cohesion occurs between different kinds of molecules. hydrogen bonds between water molecules are constantly breaking and reforming. water molecules below the surface form hydrogen bonds with water molecules all around them. molecules at the surface of water pull a water strider towards them. the cohesive forces between water molecules are hydrogen bonds.

Explanation:

• Cohesion occurs between different kinds of molecules: Cohesion is the attraction between molecules of the same kind. So this statement is false.
• Hydrogen bonds between water molecules are constantly breaking and reforming: In liquid water, due to thermal energy, hydrogen bonds are in a dynamic state of breaking and reforming. This statement is true.
• Water molecules below the surface form hydrogen bonds with water molecules all around them: In the bulk (below the surface) of liquid water, each water molecule can form hydrogen bonds with several neighboring water molecules in all directions. This statement is true.
• Molecules at the surface of water pull a water strider towards them: Surface - tension (due to cohesive forces) allows water striders to walk on water. The surface molecules pull on each other, creating a "film - like" effect that supports the water strider. This statement is true.
• The cohesive forces between water molecules are hydrogen bonds: The main cohesive force in water is the hydrogen bond between water molecules (\(H_2O - H_2O\)). This statement is true.

Answer:

1. False
2. True
3. True
4. True
5. True