In one step of the industrial process for producing copper from chalcopyrite (CuFeS2), molten copper(I) sulfide is reduced with a blast of hot air:

a. How many kilograms of   must be reduced to account for the world’s annual copper production of about kg?

b. How many liters of  at 1 bar and 25 °C are produced as a by-product?

c. If all the escaped into the atmosphere and reacted with  to produce sulfuric acid in acid rain, how many kilograms of  would there be in the rain?

The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 410. g of pure Cu?

Express your answer numerically in kilograms.

The most common source of copper (Cu) is the mineral chalcopyrite(CuFeS2). How many kilograms of chalcopyrite must be mined toobtain 355g of pure Cu?

The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 265 g of pure Cu? Express your answer to three significant figures and include the appropriate units.