A chemist wants to extract copper metal from copper chloride solution. The chemist places 1.50 grams of aluminum foil in a solution of 14 grams of copper (II) chloride. A single replacement reaction takes place. What best explains
the state of the reaction mixture after the reaction?
Unbalanced equation: CuCl2 + Al - AlCl3 + Cu (5 points)
O Less than 6.0 grams of copper is formed, and some aluminum is left in the reaction mixturlar
O More than 6.5 grams of copper is formed, and some aluminum is left in the reaction mixture.
O Less than 6.0 grams of copper is formed, and some copper chloride is left in the reaction mixture.
O More than 6.5 grams of copper is formed, and some copper chloride is left in the reaction mixture.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Define the kinetic molecular theory