Final answer:
The number of significant figures in each quantity varies depending on the value and the unit of measurement.
Step-by-step explanation:
The number of significant figures in each quantity is as follows:
(a) 0.0055 g active ingredients has 2 significant figures.
(b) 12 tablets has 2 significant figures.
(c) 3% hydrogen peroxide does not have any significant figures as percentages do not count towards significant figures.
(d) 5.5 ounces has 2 significant figures.
(e) 473 mL has 3 significant figures.
(f) 1.75% bismuth has 3 significant figures.
(g) 0.001% phosphoric acid has 3 significant figures.
(h) 99.80% inert ingredients does not have any significant figures as percentages do not count towards significant figures.