How many joules of energy are released when 62g of water are cooled from 95 to 57 c

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

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?

Avariable that is not being directly tested during an experiment should be