Why oil and water do not mix?
There are two reasons why oil and water don't mix, even if they are in the same container. The first reason is because their molecules are packed differently. The molecules of water are packed very densely so there will be more molecules of water. The second reason is that water molecules are positively charged. Since only opposites attract and oil has no charge at all, there is no force between the substances that allow them to mix.
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