1. The problem statement, all variables and given/known data How many grams of water could have its temperature raised by 1.13 °C by a mole of photons that have a wavelength of 510 nm? 2. Relevant equations E=hf λf=c 3. The attempt at a solution (3x10^8) / (510 x 10^-9) = 5.88 x 10^14 Hz multiply by Planck's constant to get E= 3.8977x10^-19 J/photon. Now multiply by avogadro's number to get 234719J 234,719J = m (4.18J/g C)(1.13 C) m = 49693g supposedly not the correct answer. I don't know the correct answer but the input thing for online homework tells me it wants 3 significant figures in grams and since you can't enter any powers of ten the answer must be less than a kg. Any ideas?