What type of energy transformation is taking place when natural gas is used to heat water

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?

What will most likely happen when two bromine atoms bond together?

Which type of fossil does this image depict?