6. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?

Can someone me with questions 15 to 17 plz.

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

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?