20 gram of marble containing 90% calcium carbonate is allowed to react with 50 gram of a concentrated acid containing 36.5% HCl by mass. find the limiting reactant ,find number of mole of excess reagent left over reacted, find the mass of salt in gram and find volume of carbon dioxide gas liberated at NTP plz help me pl​

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 .