Questions asked by JD

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• What is the wavelength of light (in nm) if #1.21*10^21# photons have a total energy of #483 J#?
  
• What is the energy in Joules of a single photon with wavelength of 154 nm?
  
• What is the mass in kg of a particle traveling at 171 m/s if it has a wavelength of 2.51x10-38m?
  
• Calculate the fequency in Hz of electromagnetic radiation released when an electron makes the transition from n=5 to n=2 ?
  
• Whats the oxidation state of the S in Li2S2O3?