From which plant can benzoic acid be obtained from?

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 moles of magnesium is 3.01 x10^22 atoms of magnesium?

What is the relation between concentration of reactants and the rate of chemical reaction?