Answer:
4.97x10^-19 Joules
Step-by-step explanation:
Energy and frequency are related by Planck's constant.
Energy = (Planck's Constant)*(Frequency)
Planck's constant = 6.626x10^-14 J/Hz
Energy = (6.626x10^-34 J/Hz)*(7.5x10^14 Hz)
Energy = 4.97x10^-19 J