Question

calculate the energy of one mole of photons of radiation whose frequency is
$5 \times {10}^{14?}$

Answer 1

• Frequency=v=5×10^14Hz
• Energy=E=?

We know

$\boxed{\sf E=hv}$

• h=planks constant

$\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 5\times 10^{14}s^{-1}$

$\\ \sf\longmapsto E=33.13\times 10^{-20}$

$\\ \sf\longmapsto E=3.3\times 10^{-19}J$