I need some help please

When molecules of water vapor in the air come in contact with a cold can of soft drink , they lose energy ,slow down, and form a liquid due to decrease in ?

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

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