Question

calculate the energy change resulting from the emission of 1.00 mole of photons at this 540 nm wavelength.
energy per photon = $3.68 \times 10^{-19}$ j/photon
e = ? kj/mole

Explanation:

Step1: Multiply by Avogadro's number

$E = 3.68 \times 10^{-19}\ \text{J/photon} \times 6.022 \times 10^{23}\ \text{photon/mol}$

Step2: Convert joules to kilojoules

$E = \frac{3.68 \times 10^{-19} \times 6.022 \times 10^{23}}{1000}\ \text{kJ/mol}$

Answer:

$222\ \text{kJ/mole}$