1. Briefly explain why water is considered as the universal solvent. 2. Using the concept of IMFA, account for the difference in boiling point and melting point of the following molecular substances: Subatance Bolling polnt (C) Melting point (°C) Helium gas, He -269 -272 Methane, CH. -162 184 H20 100 Ethanol, CHSOH 78 -117

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