When 208 grams of Al is added to a CuCl2 solution, 305 grams of copper are actually recovered by filtration. What is the % yield of Cu?
2 Al(s) + 3 CuCl2(aq) + 2 AlCl3(aq) + 3 Cu(s)

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

C3h8o3 - glycerol major species present when dissolved in water

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.