Why Does Oil Float on top of Water?

Answer

Oil floats on top of water because it has a lower density. Oil and water does not mix because water molecules are attracted to each other, this is the same for oil. Since they are attracted to their own molecules, they do not mix together.
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Oil is less dense than water
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Styrofoam, aluminum. and heavy boats designed to displace their weight in water. Source(s) retired chemist.
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1 Additional Answer
Well you know how the story goes. Water and oil don't mix due to their polar and bi polar properties. Oil floats on water basically because it is less dense. It is as simple as that.
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