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Chemistry

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The equation for photon energy, , is

where = 6.626×10−34 (Planck's constant) and = 3.00×108 (the speed of light).
What is the wavelength, , of a photon that has an energy of = 3.99×10−19 ?
How do go about solving this? I multipled the constant w/ the speed of light and divided it by the proton energy but its not correct

  • Chemistry -

    The method appears ok but you would do better to show your work and your answer.

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