39 5-30. You have 360 grams of a compound. If 54 grams of the compound is silver nitrite, what is the percentage of silver nitrite? 1. 12.5 2. 15.0 3. 17.5 4. 20.0 INFORMATION FOR ITEMS 5-31 AND 5-32 IS AS FOLLOWS: ASSUME THAT THE FOLLOWING IS THE CORRECT FORMULA FOR COMPOUNDING 1,000 ML OF POTASSIUM ARSENATE SOLUTION. Arsenic trioxide…………………….. 12.8 g Potassium bicarbonate……………… 9.8 g Alcohol……………………………... 40.0 ml Distilled water, q.s. to make 1000….. 0 ml 5-31. You receive a prescription for 285 ml of the preceding formula. How many milliliters of alcohol should you use in compounding the prescription? 1. 9.6 2. 11.4 3. 13.6 4. 15.9 5-32. If you receive a prescription for 1,800 ml of the preceding formula, how many grams of arsenic trioxide will you use? 1. 7.80 2. 19.40 3. 23.04 4. 25.60 5-33. A patient is to receive 1.8 million units of oxycillin IM. Using quantity sufficient sterile water to reconstitute a vial of 2.4 million units to 2 ml, how much of the solution should the patient receive? 1. 1.0 ml 2. 1.25 ml 3. 1.50 ml 4. 1.75 ml 5-34. A patient is to receive a 3/4 gr dose of Phenobarbital. If you dissolve two 1/2 gr tablets of Phenobarbital in 30 ml of water, how much of the solution should the patient receive? 1. 15.0 ml 2. 17.5 ml 3. 20.0 ml 4. 22.5 ml 5-35. How many grams of sodium chloride are required to prepare 1 liter of a 1:5000 solution? 1. 0.2 2. 0.4 3. 2.0 4. 4.0 5-36. Of the following types of pharmaceutical preparations, which incorporates finely powdered medicinal substances into a fatty base? 1. Lotion 2. Suspension 3. Ointment 4. Elixir 5-37. All pharmacies that dispense medications are required to have what Class balance? 1. A 2. B 3. C 4. D 5-38. What drug incompatibility occurs when agents antagonistic to one another are prescribed together? 1. Therapeutic 2. Physical 3. Chemical 4. 1 and 3 above