The density of an object is 0.89 g/ml. what would the object do if placed in water?

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.

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons