Complete the following chart using your class notes. Use the virtual simulator. Hot Pack/Cold Pack Simulator. Compound

Beginning Temp.

End Temp.

Change in Temp. (End temp. - Beg. Temp.)

(If the temp. decreased, be sure to put a negative sign (-) in front of the number. If the temp. increased, be sure to put a positive sign (+) in front of the number.)

Sodium Chloride

21° C

° C

° C

Lithium Chloride

21° C

° C

° C

Sodium Hydroxide

21° C

° C

° C

Potassium Chloride

21° C

° C

° C

3. if the dartboard below is used to model an atom, which subatomic particles would be located at z?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.