What is the solubility in moles/liter for silver carbonate at 25 oC given a Ksp value of 6.2 x 10-12. Write using scientific notation and use 1 or 2 decimal places (even though this is strictly incorrect!)

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

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.