Chapter 1, Problem 50E

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

20 grains ap = 1 scruple (exact)

3 scruples = 1 dram ap (exact)

8 dram ap = 1 oz ap (exact)

1 dram ap = 3.888 g

1. a. Is an apothecary grain the same as a troy grain? (See Exercise 49.)
2. b. 1 oz ap = ____________ oz troy.
3. 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?
4. d. What is the mass of 1 scruple in grams?