(a) Two protons in a molecule are 3.80 3 10210 m r = apart. Find the magnitude of the electric force exerted by one proton on the other. (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (c) What If? What must be a particle's charge-tomass ratio if the magnitude of the gravitational force between two of these particles is equ (a) q = (b) m =