What would the specific heat of iron be when 345 j of heat are applied to a sample of 75 g with a 10 change in temperature

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.

List four observations that indicate that a chemical reaction may be taking place

What is the molar mass of potassium nitrate, kno3