A galvanic cell is based on the following half-reactions: Ag1 1 e2 88n Ag(s) %8 5 0.80 V Cu21 1 2e2 88n Cu(s) %8 5 0.34 V In this cell the silver compartment contains a silver elec- trode and excess AgCl(s) (Ksp 5 1.6 3 10210), and the copper compartment contains a copper electrode and [Cu21] 5 2.0 M. a. Calculate the potential for this cell at 258C. b. Assuming 1.0 L of 2.0 M Cu21 in the copper com- partment, calculate the moles of NH3 that would have to be added to give a cell potential of 0.52 V at 258C (assume no volume change on addition of NH3). Cu21(aq) 1 4NH3(aq) 34 Cu(NH3)421(aq) K 5 1.0 3 1013 Pb 1.8 M Pb2

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter