A tank contains 4.33 moles of a mixture of neon, krypton, and radon at 178.3 kPa. If there are 3.00 moles of krypton in the tank, what is the partial pressure of krypton?
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Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).