Physics

Problem

The excitation of a particular molecule requires

15.0\,\text{kJ}\,\text{mol}^{-1}

. If

1.50\,\text{mmol}

of the substance is to be completely excited by light of

500\,\text{nm}

, what is the minimum number of photons needed? a)

5.7 \times 10^{22}

9.0 \times 10^{20}

5.7 \times 10^{19}

5.7 \times 10^{16}