Which sample of copper has atoms with the lowest average kinetic energy?

10. g at 45°C
20. g at 35°C
30. g at 25°C
40. g at 15°C

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule