A solution contains 0.120 mol H2O and an unknown number of moles of sodium chloride. The…

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1. In the photoelectric effect, incident blue light on a metal Incoming blue light (abeled the “emitter”) causes cellector plate mitter plate electrons to be emitted from the surface. All such emitted electrons have the same speed. The electrons go zooming off to the collector plate (another metal plate, see figure at right). The collector and emitter can be held at a fixed potential difference by a Let’s assume the collector is held at a vacuum electrons get to collector plate Ammete power supply. power supply current flows potential of zero volts. Let the potential of the emitter plate be V (note that V0). If the speed of the emitted electrons is 10° m/s, at what potential, V, must the emitter plate be held so that none of the emitted electrons can reach the collector? That is, if the potential of the emitter is set below this value, the electrons can reach the collector. If the potential of the emitter is set above this value, none of the electrons can reach the collector.