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| Before you ask, let me explain. A molecule is the simplest unit of most compounds. Cohesion is an attraction between molecules of the same substance. | |
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| Adhesion is the attraction of molecules of different substances. Like water and glass. | |
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| Why is water cohesive? | |
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| Water is cohesive, because it is polar. The hydrogen side of a water molecule is slightly positive, while the oxygen side is slightly negative. | |
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