Please Help A galvanic cell consists of an SHE ( as the left - hand electrode ) with standard potential equals to -0.76 volt . It has a rod of zinc dipping into a solution of zinc ions at 298 K gave measured emf of -0.789 volt . What is the activity of the zinc ions?​

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.