If my scientific aim is to measure the amount of purified wasted produced from a solar still, how would I write a conclusion answering the aim?

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.

Nonpoint source pollution is difficult to control because it

Find the mass, in grams, of 5.00*10^23 molecules of f2