Help me pls ASAP thank you

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

C3h8o3 - glycerol major species present when dissolved in water

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?