Photochemistry Is When Light Causes a Chemical Reaction to Occur

Multiple Choice

Photochemistry is when light causes a chemical reaction to occur. A simple example is when light breaks a Cl₂ molecule apart into 2 Cl atoms. If the energy required to break apart a mole of chlorine molecules is 243 kJ, a photon of what frequency will break apart a single Cl₂ molecule?

A) 6.1 x 10¹⁴ s^-1
B) 4.0 x 10^-19 s^-1
C) 3.7 x 10³⁵ s^-1
D) 5.2 x 10¹⁵ s^-1
E) none of the above.