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| Substance | 933 | An Object in which every part is similar to every other in every relevant respect. More precisely... | ^ |
| Surfactant | 2 | Surfactants, also known as Wetting agents, lower the surface tension of a Liquid, allowing easi... | ^ |
| Soap | . | Soap is a Surfactant Cleaning mixture used for personal or minor cleaning. It usually comes in ... | ^ |
| Detergent | . | A detergent is a compound, or a mixture of compounds, whose molecules have two distinct regions: on... | ^ |
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