A 20 kg box rests on a table. a. Identify the three action-reaction force pairs involved in the box sitting on the table.

b. What force does the earth exert on the box?

c. What force does the box exert on the earth?

How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so. measure reactants precisely. stir to the reaction take place. chill the reactants before combining them. wait patiently until the reaction completes. make sure to recover as much copper as possible.