Question

Substance 1: Physical description: This substance is a lustrous, gray substance. Chemical information: Observed melting point: 2065-2070°C Observed boiling point: 2,972-2975 °C Estimated molar mass: 102 g/mol Density: 3.95 g/cm Solubility in water: Insoluble Other: This substance is a thermal conductor but an electrical insulator. This substance is very hard and abrasive. Spectroscopic information: There is no 'H or 13C NMR data for this substance. Sources:

Answer 1

From the given data, the given compound is aluminum trioxide, alumina, Al2O3. The given compound is insoluble in water because the compound is covalent in nature. There is 1H and 13C NMR for the given compound because it does not contain H's and C's. Since the given compound is covalent, it is electrical insulator.