Predict the splitting pattern you would observe for the proton at C3 of 2,3-dimethyl-2-phenylbutane. Why is it a singlet?

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.

Can someone me with 6 to 10 plz this is for masteries test.

Why do oxygen have a strong attractive force for electrons