I need to know how to calculate energy from frequency. I am using the equation energy = plank's constant*frequency. I know the answer should be 1.2*10^2 KJ/mol but I'm getting the wrong answer, I think I must be doing something wrong with the units. Frequency = 3*10^14 Hz and Planck's constant being 6.26*10^-34 J.s. So I do Energy =3*10^14 * 6.626*10^-34 and get the answer 1.9878*10^-19. What am I doing wrong?