1. List the properties of a substance that would definitely establish that it is a molecular material. 2. If we classify substances as ionic, molecular, macromolecular, or metallic, in which if any categories are all the members a. soluble in water? b. electrical conductors in the melt? c. insoluble in all common solvents? d. solids at room temperature? 3. A given substance is a white, granular solid at 25C that does not conduct electricity. It melts at 750C without decomposing, and the melt conducts an altemating electric current. ft dissolves readily in water, to produce an electrically conductive solution. What would be the proper classification of the substance, based on this information? 4. A lustrous gray-white solid melts at 1650C. It is electrically conductive as both a solid and a liquid, but not soluble in either water or any organic solvent. Classify the substance as best you can from these properties