that best answers the exercise, by completing the incomplete statement, or by writing

the answer in the space provided at the end of the exercise.

After you have completed all of these exercises, turn to "Solutions to Exercises"

at the end of the lesson and check your answers. For each exercise answered

incorrectly, reread the material referenced with the solution.

1. How many grams of coal tar must be added to 500 grams of a 1% coal tar

ointment to make a 4% coal tar ointment?

ANS: ___________ grams of coal tar

2. How many milliliters of water must be added to one quart of Zephiran

solution (17%) to make a 1:1000 solution?

ANS: ___________ milliliters of water

3. How many grams of each ingredient are needed to compound the following

prescription? The specific gravity of mineral oil is 0.85.

ANS: ___________ g zinc oxide

___________ g sulfur, ppt

___________ g mineral oil

___________ g petrolatum

MD0802

2-42

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