19 points Is this statement true or false?

A chemical reaction is balanced when the number of atoms of each element is the same for both the reactants and the products.

true

false

When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation