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Watch Later 2:04

S.3 biology Ch.4 礦物質

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Chemistry tutorial-Ch25-5-Effect of charged rod on polar and non-polar liquids

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Chemistry tutorial-Ch25-4-Predicting the polarity of a molecule

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Chemistry tutorial-Ch25-3-Polarity of molecule

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Chemistry tutorial-Ch25-2-Bond polarity

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Chemistry tutorial-Ch25-1-Electronegativity of an atom

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Chemistry tutorial-Ch24-5-Molecular shapes of CO2, SO3, HCN, HCHO and SO2

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Chemistry tutorial-Ch24-4-Molecular shapes of PCl5 and SF6

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Chemistry tutorial-Ch24-3-Molecular shapes of BeF2, BF3, CH4, NH3 and H2O

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