Question

chemistry review - water: properties of water
11 parts | -- of 1 point
review the properties of water tutorial.
then answer the questions.
part a (1 of 11)
3 tries left
which statement must be mentioned in explaining why amphipathic molecules line up at a water surface?
nonpolar groups attract one another.
nonpolar groups repel water.
polar groups repel water.
polar groups attract one another.
all of the above.

Explanation:

Amphipathic molecules have both polar and non - polar parts. Water is a polar molecule. Non - polar groups of amphipathic molecules are hydrophobic (water - fearing), meaning they repel water. This causes the non - polar parts to move away from the water and line up at the water surface. Polar groups are hydrophilic (water - loving) and interact with water.

Answer:

Nonpolar groups repel water.