Which statement best describes a weak acid?
a. an acid in a dilute solution
b. an acid that dissociates completely in solution
c. an acid in a concentrated solution
d. an acid that dissociates only slightly in solution

D. An acid that dissociates only slightly in solution

Explanation:

A weak acid is an acid that is slightly dissociated into its ions in a solution.  At similar concentration, weak acids have higher pH value than strong acids.

Examples of weak acids includes acetic acid, hydrogen sulfide, formic acid,

hydrofluoric acid etc.

14 days is the half-life of phosphorus-32

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be