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love history [14]
3 years ago
10

For light with a wavelength of 12.5 nm, determine the energy of light in kJ/mol

Chemistry
1 answer:
vovikov84 [41]3 years ago
3 0
Energy is related to Wavelength as,

                                   E  =  h c / λ      --------  (1)
As,
       h  =  6.626 × 10⁻³⁴ Js
       c  =  2.99 × 10⁸ ms⁻¹
       λ  =  12.5 nm = 1.25 × 10⁻⁸ m

Putting values in eq. 1,

             E  =  (6.626 × 10⁻³⁴ Js × 2.99 × 10⁸ ms⁻¹) ÷ 1.25 × 10⁻⁸ m

             E  =  1.585 × 10⁻¹⁷ J

             E  =  1.585 × 10⁻²⁰ kJ × 6.022 × 10²³

             E  =  9544.87 Kj/mol
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