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Problem- One of the spectral lines in the emission spectrum of mercury has a wavelength of 6.234x10-7m. How much energy is emitted if 1.00 mole of mercury atoms emits light of 6.234x10-7j? Express your answer in KJ/mol. Please Help!!

How do I go about solving this? in parentheses at the end of question it tells me avagadro's?

I am need of complete solution for this problem please help- me out to get right solution

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