What is the energy, in joules, of 1.0 mol of photons of green light?
Areas of Interest

Interesting Articles
 How do I know when I can recycle a computer component, and when it's safe to throw it out?
 How much, an average if possible, does it cost to install a windmill?
 Do you think everyone should do there best to recycle?
 PARABOLIC TROUGH REFLECTOR SOLAR WATER HEATER GREEN POWER
 Homebrew Solar Panel 60Watts
 3 FRESNEL LENS SOLAR HEATER SUN COLLECTION GREEN ENERGY
 Homemade Solar Food Dehydrator
 Repower America  Bill Nye, The Science Guy
 Infinia Stirling Solar Generator
 Solar Furnace
 Start a Revolution / Clean Energy SmartPower.org Contest
 Self Running 40kW (40000 Watt) Fuelless Generator (1 of 3)
 How It's Made  Solar Panels
 SOLAR PANEL DIY MAKE YOUR OWN SOLAR PANEL BUILD SOLAR PANELS
What We Are
ALTERNATIVE battery BUILD Certification Clean cost Design Earth Efficiency efficient Electric ENERGY First Free Geo Thermal global GREEN GRID Heat homes House installation Jobs Leed light nuclear Panel plants POWER pump Recycle Recycling renewable roof School Solar sustainability Sustainable Technology Thermal TURBINE Video Water Wind Windmill
Frequency = speed of light/wavelength
F = 3×10^8/5×10^7 = 6×10^14 Hz
Energy = Planks Constant x frequency
E= 6.63×10^34 * 6×10^14 = 3.978×10^19 which is roughly equal to 4×10^19 J for the energy of 1 photon of green light.
4×10^19 x 6.02×10^23 (Avogadro’s Number) = 240800 J per mole of photons of green light. This is 240000 J per mole when rounded to 2 s.f. as given in the question.
To solve this, you would use the formulas c=(lambda)v and E=hv.
First you would plug in 5.0 x 10^7 m into the first equation and solve for v, the frequency.
3.0×10^8 m/s = (5.0×10^7 m)v
Once you solved for v, you would plug that into the equation E=hv, and solve for E. (By the way, the units for v is per seconds, or s^1.)
E=(6.636×10^34 J/s)(your answer for v s^1)
h is Planck’s constant.
This would give you the answer for one photon, and multiplying that by 6.02×10^23 would give you the answer for one mole.
Hope this helps!
E=h*nu
c=nu*lambda
where h is plancks constant(m2 kg/s2), nu is frequency(1/m), lambda is wavelength (m), and E (J). that’s for one photon, so then just multiply by avogadro’s #.