Question

Please help me with my hw fast

Answer 1

Answer;

548 kJ

Explanation and solution;

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.

Answer 2

Answer is cool than your answer kid