Be sure to answer all parts. in a future hydrogen-fuel economy, the cheapest source of h2 will certainly be water. it takes 467 kj to produce 1 mol of h atoms from water. what is the frequency, wavelength, and minimum energy of a photon that can free an h atom from water? enter your answers in scientific notation. frequency = 7.05 × 10 -32 s−1 wavelength = 4.26 × 10 -25 m minimum energy = × 10 kj/photon