Megan shines a torch on a wooden block in front of the screen and observes a square-
shaped shadow as shown below.
shadow
lighted torch
wooden
block
screen
(a)
A shadow is formed when light is
by an object

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.