The main difference between the bohr model of the atom and the wave-mechanical model of the atom lies in the level of certainty of where the electrons are located.

The main difference between the Bohr model of the atom and the wave-mechanical model of the atom lies in the level of certainty of where the electrons are located is true

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

i think the answer is terrae but not 100 percent sure. ▓▬▬ §