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Evgesh-ka [11]
3 years ago
15

Please help me with my hw fast

Chemistry
2 answers:
algol133 years ago
7 0
<h3><u>Answer</u>;</h3>

548 kJ

<h3><u>Explanation and solution</u>;</h3>

The energy in joules of a single photon of wavelength λ in meters is:  

E = hc/λ , where h is the planks constant, 6.63x10^-34 J·s, c is the speed of light, 3x10^8 m/s and λ is the wavelength in meters.

   = (6.63x10^-34 J·s) (3x10^8 m/s) / (655 nm) (1x10^-9 m/nm)

   = 3.03x10^-19 J.  

The energy in kilojoules of 3 moles of photons of this wavelength is:  

    = (3.03x10^-19 J) (6.02x10^23 /mol) (3.0 mol) / (1000 J/kJ)

     = 548 kJ.

tatyana61 [14]3 years ago
4 0

Answer is cool than your answer kid

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