How many atoms in 12.5 grams of sodium?

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 feature do highland climates have that lower elevation areas do not?

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen