What are plate tectonics? how have the continents changed over the years?

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 must be in balance for temperatures to remain constant?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?