The ph of your stomach must be (a)more than 7 (b)basic (c)equal to 7 (d) none of the above

(d) None of the above

Explanation:

The pH of your stomach must be highly acidic, because the optimum pH for pepsin, the chief stomach enzyme, is 1.5.

(a) and (b) are wrong, because both conditions are basic.

(c) is wrong, because pH 7 is neutral.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.