A team of engineers has decided to design a new shoe for people suffering from a painful foot condition. Which of the following tasks should the team
undertake during the process of researching the condition?
A. Determine how much potential consumers would be willing to pay
for this new product.
B. Find a rubber manufacturer to design the sole of the new shoe.
C. Test the shoe in a trial.
D. Consult with an orthopedist about how to best accommodate
potential consumers in terms of physical comfort and pain
alleviation.

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 .