Answer:
Water is a micromolecule which goes inside the egg.
Step-by-step explanation:
The egg increased in mass by placing it in distilled water but decreased in mass in the corn syrup because water is a micromolecule which can easily moved into the egg through the small pores of the shell by the process of osmosis while the corn syrup is a macromolecule which is big for the pores present in the shell so that's why due to water movement through the pores increases mass of the egg.