determine the percent yield of a reaction that produces 28.65 g of fe when 50.00 g of fe2o3 react with excess al according to the following reaction.

Which is an advantage to using nonrenewable resources? a. they can be cheaper. b. they can have a lower impact on the environment. c. they can be used up rapidly. d. they can contribute to global warming.

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy

The author believes that the concept of fairness is not a useful term