What are the 3 physics properties of aluminum foil

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

Can someone me with 3 and 4 plz. this is for masteries test.