a 100 gram sample of radioactive material decay to 25 grams in 6 hours the half life of this material is A 12 hours B 6hours C 3 hours D 4 hours

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?