5. A 100-kilogram salt solution originally 4% by weight. Salt in water is boiled to reduce water content until the concentration is 5% by weight salt. How much water is evaporated? A. 10 B. 15 C. 20 D. 25

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Q: 12) How many levorotatory isomers are there of OH (A) 3 (B) 2 (C) 1 ОН ? (D) 0

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Q: try try 대대, 2 3 대대로 R D 애 애 ? CH CH R CEN: H "", CH2CH3 :N=Ceo, S

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