Which statement best describes what happens when oil and water are stirred together? 1. Water and oil molecules have opposite electrical charges, causing them to repel each other and separate.

2. Oil and water molecules have like charges, causing them to repel each other and separate.

3. Water molecules will attract each other electrically, but they will not attract oil molecules, causing separation.

4. Oil molecules will repel each other electrically, leading to complete mixing of the two substances.