You find a rock that is very sandy and grainy. sand grains fall off as you handle it. what kind of rock do you suppose it is?

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.

One does not belong why? ice, gold ,wood ,diamond and table salt

How many atoms are there in 5.70 mol of mg