Two small silver spheres, each with a mass of 10.9 g, are separated by 1.02 m. Calculate the fraction of the electrons in one sphere that must be transferred to the other to produce an attractive force of 1.07 104 N (about 1 ton) between the spheres. The number of electrons per atom of silver is 47. (The molar mass of silver is 107.87 g/mol.)