What was unexpected about your observations? What will be an ...

[JGIBBSON]

What was unexpected about your observations?
 
  What will be an ideal response?

Question 2

Imagine you repeat this experiment with a Mylar balloon (the shiny metallic-looking ones that are filled with helium and tend to last a long time). Predict what you think will happen and explain the basis for your prediction.
 
  What will be an ideal response?

[qytan]

Answer to Question 1

The volume is less than one would expect simply by adding the two individual volumes.

Answer to Question 2

I think we might not be able to smell the peppermint. The reason I think this is that Mylar balloons usually last longer than the regular balloons (i.e. the air stays in them longer) so we might assume that the sub-microscopic holes in the Mylar are smaller, maybe so small that the peppermint particles can't escape. Note: Try it out in class or encourage them to try it on their own and report back.

[JGIBBSON]

Great answer, keep it coming

[patma1981]

Thanks for the timely response, appreciate it