Describe the relationship of the atoms shown by: a) the rearrangement of atoms is a chemical change. b) stability of the atoms in the molecule means a physical change. c) a change in state of matter from a liquid to gas is a physical change. d) a change in state of matter from solid to liquid is a physical change.

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)