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E=hc/l

h=plank's constant

c=speed of light

l=wavelength

[(6.626*10^34)(3*10^8)]/(5.50*10^-7)=

3.614*10^-19

for per mole

(3.614*10^-19)*(6.022*10^23)=

2.18*10^5

muliply by .001 for kilojoules

=2.18*10^2 or just 218 kj/mole

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