5. A beam of photons with a minimum energy of 222 kJ/mol can eject electrons from a potassium surface. Estimate the range of wavelengths of light that can be used to cause this phenomenon. Show your calculations with units of measure (dimensional analysis) and briefly explain your reasoning.
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5. A beam of photons with a minimum energy of 222 kJ/mol can eject electrons from a potassium surfac...
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