Light energy can be described as nhf, where n is a number of photons, h is Planck\'s constant, and f is the frequency of the light (also denoted by the symbol ?). Calculate the minimum number of photons, n, needed to make the reduction of 2 moles of NADP favorable for light absorbed at 6.80 × 102 nm. Assume that the amount of energy needed for the reduction of one mole of NADP to be favorable must exceed 219 kJ/mol.