Substance X has a melting point higher than 500 degree celsius. It is insoluble both in water and in organic solvents. It conducts electricity both when solid and when molten. What could X be?
(1) copper
(2) magnesium oxide
(3) poly(ethene)
(4) silica
(5) sodium chloride
The answer is (1) copper..why? I don't understand..Please explain..Thanks.
2007-11-06 15:42:26 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Copper is a metal that requires high temps. to melt it. It is insoluble in water and organic solvents, but conducts electricity (copper wires).
MgO is soluble in water.
Polyethene melts at much lower temps, is insoluble in water and does not conduct electricity.
Silica does not conduct electricity.
Sodium chloride is soluble in water.
2007-11-06 15:48:45 · answer #1 · answered by Doctor J 7 · 0⤊ 1⤋