What is the mass in grams of 3.0x10^23 molecules of carbon dioxide? ?

Iwill give extra points to who gets this right

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?

May someone me with these science questions