REVIEW: Lesson Two Answers

James needs to measure 3.5 mL of amoxicillin 250 mg/5 mL for his toddler’s ear infection. He has a 5 mL oral syringe, marked in 0.2 mL increments. Can he accurately measure 3.5 mL in the 5 mL syringe?

• Yes, draw up to halfway between the 3.4 mL line and the 3.6 mL line

• No, the syringe cannot measure 3.5 mL accurately

• Yes, but only if he fills the syringe twice

• No, he needs a 1 mL syringe to measure 3.5 mL

Which of the following terms are the correct fundamental units of length, weight, and volume in the metric system?

• Inch, pound, quart

• Meter, kilogram, milliliter

• Feet, gram, liter

• Meter, gram, liter

Students are asked to measure the temperature of a solution, using the same thermometer, that has been sitting at room temperature (70°F) for 3 days. The students report the following results: 65, 79, 88, and 59°F. Which statement below best describes the students’ measurements?

• They are precise and accurate.

• They are neither precise nor accurate.

• They are accurate.

• They are precise.

Dr. Leland calculates that her patient needs a dose of phenobarbital, based on body weight, of 144.58 mg to be given twice a day. Phenobarbital is available in a concentration of 3 mg/mL so you will need to draw up 48.193 mL for each dose. A 60 mL syringe has 1 mL calibration markings. To what volume should you round to measure as accurately as possible?

• 48 mL

• 45 mL

• 50 mL

• 40 mL

Which of the following prefixes is equivalent to 1/1,000?

• Kilo

• Milli

• Micro

• Centi

Patrick is measuring salicylic acid for compounding an ointment. He calculates that he needs to measure 1,467 mg of salicylic acid, but the balance (a weighing device used in pharmacy) can only measure in increments of 10 mg. How many milligrams should Patrick weigh?

• 1,470 mg

• 1,480 mg

• 1,500 mg

• 1,400 mg

Nick, the pharmacy technician at Save Rite Pharmacy, receives a prescription as follows:

Promethazine with codeine

Disp: vii fl oz

He sees a 16 fluid ounce bottle that appears to be about half full on the shelf. How many ounces of promethazine with codeine will be left after the prescription is filled?

• The bottle should be empty after filling the prescription.

• 2 fluid ounces will be left after filling the prescription.

• 1 fluid ounce will be left after filling the prescription.

• 6 fluid ounces will be left after filling the prescription.

Rich is trying to figure out how much medication to dispense for the following prescription:

Prednisone 1 mg/mL

Disp: 14d supply

Sig: 6 mg p.o. daily

How much prednisone will Rich dispense to provide 10 days’ worth of medication?

• 64 mL

• 84 mL

• 32 mL

• 100 mL

The true volume of soda in a standard aluminum can is 355 mL. A student pours a can of soda into a separate container four different times and measures the volume to be 335, 336, 334, and 335 mL, respectively. Which statement below best describes the student’s measurements?

• They are neither precise nor accurate.

• They have good accuracy.

• They have good precision.

• They have poor precision.

Jenny, CPhT, prepares medications for patients who have been discharged from the hospital’s surgery center. She receives an order for the following prescription:

Vicodin tablets

Disp # LVII

Jenny only has an open bottle of 76 tablets left and has another prescription for 24 tablets. If she dispenses the Vicodin as ordered here, will she have enough left to fill the second prescription?

• This prescription is for 57 tablets, she will have enough for both prescriptions.

• No, she will not have enough tablets left for the second prescription.

• She will only have enough for the second prescription, not the first.

• This prescription is for 48 tablets, she will have enough for both prescriptions.