Ka is known as the acid dissociation constant. It is a measure of an acid strength of a solution. It is an equilibrium constant for the dissociation of an acid or base in a solvent. A very large value of Ka represents a strong acid. For instance, for HI, Ka is 3.2 x 10^9 and for HBr, Ka is 1.0 *10^9.
C. NaOH ammmonia is also an base but not as strong as NaOH
The best answer among the choices given that describes compression would be "<span>region of high pressure in a medium caused by a passing wave." The concepts of air compression is widely used in the industries such as vehicle tires, balloons, and other inflatable materials requiring high air pressure.</span>