Acertain amount of gas is trapped in a nonrigid container at atmospheric pressure. if the container is cooled and the gas in the container remains at atmospheric pressure, what will happen? a. the number of moles of gas will decrease. b. the number of moles of gas will increase. c. the temperature of the gas will increase. d. the volume of the container will decrease. e. the volume of the container will increase.

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 .