Question

A nurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. If the stock bottle is labeled 25 mg/mL and theorder is a dose of 15.0 mg, how many milliliters will the nurse draw up the syringe? Express the volume in milliliters to two significant figures.

Answer 1

Step-by-step explanation:

We are given: density of promethazine = 25mg/mL

: mass of promethazine = 15.0mg

`\begin{gathered} D\text{ = }(m)/(V) \\ \\ \therefore V\text{ = }(m)/(D) \\ \\ \text{ = }(15)/(25) \\ \\ \text{ = 0.60 mL} \end{gathered}`

Answer:

The nurse will draw up 0.60 mL.