When would evaporation be a good method for separating the parts of a mixture? A. When the densities of the compound are different
B. When some of the components are magnetic
C. When some of the components are very small
D. When the boiling points of the components are different

D.When the boiling points of the components are different

Explanation:

I believe the formal name for this procedure is actually distillation.

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.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.