Part B
1. Since there are 1000mg in one gram, one should (multiply or divide) by 1000 to convert g to mg. For example, a 1.5g dose of aspirin is equivalent to ______mg of aspirin.
2. On the other hand, if you wanted to convert mg to g, you would (multiply or divide) by 1000. For example, one of the Advil tablets discussed above contains 200mg of ibuprofen which is equivalent to ______g ibuprofen.
3. Weigh one aspirin tablet. Record your data in the table below. Read the label on the aspirin bottle and record the mass of the active ingredient (aspirin) in each tablet.
4. Weigh one Tums tablet. Record your data in the table below. Read the label on the Tums bottle and record the mass of the active ingredient (calcium carbonate) to 3 sig figs in each tablet.
5. Data – Milligrams
Tablet
Mass of Tablet (g)
Mass of Active Ingredient (mg)
Aspirin
Tums
6. What is the mass of the aspirin tablet in mg? Show your work.
7. What is the mass of the Tums tablet in mg? Show your work.
8. Calculate the percent (by mass) of active ingredient in each of the tablets. Show your work. [Percent = mass of active ingredient x 100] total mass of tablet