Does bread dough weigh the same once it's been baked?
No, lots of liquid (water and other liquid ingredients) evaporate while baking. So it will weigh less.
i think so
No. Something is missing after it's baked. What is it?
No, the density of the bread changes.
I believe it weighs less after baked..?
the moisture from the dough evaporates when exposed to heat... water is pretty heavy =)