Which of the following is using chemical potential energy? o a. a petal falling from a flower o b. a water wheel turning in a stream o c. an apple hanging on a tree o d. a hiker eating an energy bar

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.

Which other elements contain the same number of outer electrons as sodium

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false