Answer:
1.9 x 10^-20 Joules
Step-by-step explanation:
I'll assume the frequency is 2.9 x 10^13 Hz [5-1 was meant to be s^-1].
The energy of a photon is given by the releationship:
E = hf, where E is energy, h is Planck's constant, and f is frequency, in 1/s or Hz.
Planck's constant = 6.62607E-34 J*s
E = hf
E = (6.626 x 10^-34 J*s)*(2.9 x 10^13 s^-1)
E = 1.9 x 10^-20 Joules