What is the frequency in Hz (or 1/s) of light that has a wavelength of 350 nm ?​

This app wont let me paste it its a math website where i found the answer, i stg its not one of those links people put and say they cant put the image or stuff if u would like here https://socratic.org/questions/what-is-the-energy-of-photon-with-a-wavelength-of-350nm

Explanation:

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.