_______ report a code for HIV infection or illness without a specific physician diagnostic statement-a confirmed diagnosis.

More complex counters use the ________ of a single tablet and the number desired to calculate the final amount, improving accuracy close to 99.9%

A) color B) length C) density D) weight

Hydrogen ion activity can be expressed as which of the following?

a. pH = log10[H–] c. pH = –log10[H+] b. [H+] = log ? 10 d. pH = 1 ? 10?7 mol/L