Iron (Fe) has three isotopes. Calculate the average atomic mass of the element Fe using the following data: Isotope atomic mass (u) % abundance Fe-54 53.94 6% Fe-56 55.93 92% Fe-57 56.94 2%

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

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.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.