The symbol ∆ in a chemical equation means:

precipitate.

heat is supplied to the reaction.

a catalyst is needed.

yields.

In a calorimeter, the equilibrium temperature of copper in water is determined. if the water is replaced with a liquid that has a lower specific heat, what will happen to the equilibrium temperature

10. How do substances change after a chemical reaction? cal A They lose mass. B Their atoms are rearranged. C Their atoms lose electrons. D They change phase.

What type of indications would be shown if an igneous rock cooled quickly? Small tiny crystals Large visible crystals No visible crystals No visible indication

True or false? A chemical change involves an energy change.

When determining if a bond is polar, we must evaluate the difference in electronegativity (δen) of the atoms involved in the bonding?

Which substance is a diatomic molecule? a. he b. o2 c. co2 d. h2o?

What is the difference between the electronegativity values of sodium and bromine?

Which of the following elements is the most stable element? argon, manganese, phosphorus, robidium

List results of Chemical Reactions.

When you measure something in meters cubed, you are measuring