A laser emits light that has a frequency of 6.69 x 1014 s-1. If the laser emits a "pulse" (a burst of light) that contains 7.0 x 1017 photons, what is the total energy of that pulse in Joules? Do not use scientific notation in your answer. Give the answer ( in Joules) to 2 significant figures.

Time remaining 58: 10 an atom that has 84 protons and 86 neutrons undergoes a reaction. at the end of the reaction, it has 82 protons and 84 neutrons. what happened to the atom? it accepted radiation in a chemical reaction it donated neutrons to another atom in a chemical reaction it emitted an alpha particle in a nuclear reaction. it accepted protons in a nuclear reaction. mark this and retum save and exit next submit