Apothecaries (druggists) use the following set of measures in the English system: 

a. Is an apothecary grain the same as a troy grain? (See Exercise 49.)

b. 1 oz ap = ________ oz troy.

c. An aspirin tablet contains 5.00 × 10² mg of active ingredient. What mass in grains ap of active ingredient does it contain? What mass in scruples?

d. What is the mass of 1 scruple in grams?

Transcribed Image Text:

20 grains ap 1 scruple (exact) = 3 scruples = 1 dram ap (exact) 1 oz ap (exact) 3.888 g 8 dram ap = 1 dram ap