Write the cell reaction and the equilibrium constant expression for, and determine the cell potentials at 25°C of the following electrochemical cells. (Use the lowest possible coefficients. Omit states-of-matter in your answer. Enter your answer using the format K = pHCl / pH2 . pCl2 to indicate partial pressures for gases or K = [H3O+] . [F-] / [HF] for aqueous chemicals.

Cr | Cr3+ (0.060 M) || Ag+ (0.68 M) | Ag

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

the answer would be a

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.