A photon has a frequency of 6.0x10^4 Hz. Calculate the energy(in joules) of 1 mole of photons all with this frequency.

This is what I have so far:
$E=hf\=(6.626 \times 10^{-34})(6 \times 10^4)\=3.98 \times 10^{-29}$

then what i have to do next?

Question

A photon has a frequency of 6.0x10^4 Hz. Calculate the energy(in joules) of 1 mole of photons all with this frequency.

This is what I have so far:
$E=hf\=(6.626 \times 10^{-34})(6 \times 10^4)\=3.98 \times 10^{-29}$

then what i have to do next?

anonymous · Answer

You now have the energy of a single photon (in Joules).

If you want one mole then you just draw on your knowledge that a mole one Avogadro's Number of a given thing. So you must multiply the value that you got by Avogadro's number:

$$=3.98\times10^{-29}\times6.022141\times10^{23}$$
$$=2.3968\times10^{-5}Joules$$

nincompoop · Answer

$$E = h \nu = h\frac{c}{\lambda}$$

anonymous · Answer

thanks