At STP, 14.2 L of an unknown pure gas has a mass of 44.95 g. What element is the gas?

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.

Why is permeable soil best for plants that need a lot of drainage?

Define a is a tiny pavket of energy