Develop a definition of chemical change, using atoms and molecules, in your definition. Use complete, grammatically correct sentences.

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 bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?