Does anyone know the answers and if i got any wrong/right?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer