If you have 50 milliliters of a 0.75 molar solution of NaCl, how much water, in milliliters, should you add to dilute the NaCl concentration to 0.25 molar?
10023) Physics - Short Answer A 100 milliwatt laser delivers \(2.50\times 10^{17}\) photons per second. Expressing your answer in scientific notation with one significant figure, how much energy in joules does each photon deliver?