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The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.42 x 10e-6 m that must be absorbed to melt 2.00 g of ice.

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Eice to melt ice = mass x heat fusion.
Ephoton is hc/wavelength.
#photons = Eice/Ephoton

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