Destiny of air 

Topic: Destiny of air

please see the video first from the link https://files.fm/u/bgf48a4k and then complete the attachment report

Questions:                                                                                     +10

  1. Did the mass of the flask and the air inside change from step III to step IV? Explain this result. Also explain what would you expect if you compared the mass of the evacuated flask at two different temperatures.
  2. Estimate the temperature to which you heated the flask from your data .