According to collision theory, what must particles have in order to react when they collide? the particles must have sufficient kinetic energy. the individual particles must have equal masses. the individual particles must contain common atoms. the particles must be present in the same concentration.

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.

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