Identify the following as an element or compound copper ii oxide

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

c is the answer because when something is left after something evaporates that shows the chemical change.

let that person have a turn to speak : )