Find number of the photons in 2 mole of energy.

Find Energy of each photon in eV .

Find the number of hydrogen atoms in 0.1 mole of H_2SO_3 .

Calculate the number of photons in 6.62 J of radiation energy of frequency 10^(12) Hz. Given h=6.62 xx 10^(-34) Js.

Calculate number of atoms in 1 mole of nitrogen (N2)

Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength 6000 oversetcircA .

What is the number of molecules in 0.25 moles of oxygen.

light of wavelength 2200 overset@A (angstorm) falls on photosensitive plate with work function 4.1 eV. Find energy of photon in eV (electron Volt) Find maximum kinetic energy of photoelectron and stopping potetial.

Find the number of photon emitted per minute by 60 what lamp of monochromatic light of wavelength 5000 overset @A