What is true about polar solvents? select all that apply.
a) the particles of polar solvents dissolve no polar solute
b) the particles of polar solvents have areas of partial negative charge
c) the particles of polar solvents carry no partial charges
d) the particles of polar solvents have areas of partial positive charge

B & D

Explanation:

The molecules of polar solvents have dipoles with partial polarity. The reason for dipoles is that some parts of the molecules attract much of the electron cloud of the whole molecule than other parts of the molecule. The part with the more electron cloud become partially electronegative while the part with the least electron cloud becomes partially electropositive.  

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.

wher is the rest of the question