2. given the balanced equation: 2 n2h4(1) + n2o4(1) + 3 n2(g) + 4h2o(g) a. how many moles of dinitrogen tetrahydride are required to produce 57 moles of nitrogen b. how many moles of dinitrogen tetroxide are required to produce 57 moles of nitrogen? c. how many moles of water are produced when 57 moles of nitrogen are made? 3. calculate the mass of aluminum oxide produced when 3.75 moles of aluminum burn in oxygen.

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 .