what is the best description of osmosis?
a. random movement of oxygen molecules across a concentration gradient until the number of molecules is nearly equal

b. movement of molecules from areas of higher concentration to areas of lower concentration

c. movement of water from an area of lower solute concentration to an area of higher solute concentration

d. net movement of molecules across the nuclear membrane until the number of molecules on each side is nearly equal

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .