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سؤال ... لماذا حين نخلط الملح مع الحصى مع الماء ونقوم بعدها بتصفية الماء ... نجد بعد يومين ان الماء قد تبخر وبقي الملح فقط.؟

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Question added by Maher Ramo
Date Posted: 2018/02/06
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