Water and oil will form two separate layers when placed in the same container. What is the microscopic explanation for this macroscopic behavior? The strength of the bonds between like molecules is stronger than the strength between unlike molecules. Therefore, some regions will exist in which the water molecules will exclude oil molecules and other regions will exist in which oil molecules will exclude water molecules, forming a heterogeneous region. The strength of the bonds between like molecules is weaker than the strength between unlike molecules. Therefore, some regions will exist in which the water molecules will exclude oil molecules and other regions will exist in which oil molecules will exclude water molecules, forming a homogenous region. The strength of the bonds between like molecules is weaker than the strength between unlike molecules. Therefore, some regions will exist in which the water molecules will include oil molecules and other regions will exist in which oil molecules will exclude wate