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Date: 21-5-2019
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Date: 8-4-2019
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How dissolving happens
Why do some things dissolve in one solvent and not another? For example, oil and water don’t mix to form a solution, but oil does dissolve in gasoline.
There’s a general rule of solubility that says like-dissolves-like in regards to polarity of both the solvent and solutes. A polar material is composed of covalent bonds with a positive and negative end of the molecule. (For a rousing discussion of water and its polar covalent bonds. A polar substance such as water dissolves polar solutes, such as salts and alcohols. Oil, however, is composed of largely nonpolar bonds, so water doesn’t act as a suitable solvent for oil.
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دور النظارات المطلية في حماية العين
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العلماء يفسرون أخيرا السبب وراء ارتفاع جبل إيفرست القياسي
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اختتام المراسم التأبينية التي أهدي ثوابها إلى أرواح شهداء المق*ا*و*مة
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