Calcuate the mass of CO2 prodcued from the reaction of 1000. g Fe2O3 according to the following rxn. Fe2O3(s) + 3CO(g) →2Fe(s) + 3CO2(g)

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12

What is the mass of 0.750 mole of aluminum oxide, al2o3?