MirielleC655077 MirielleC655077

03-11-2022
Chemistry

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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.

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AnalauraS289594 AnalauraS289594

03-11-2022

Explanation:

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

: mass of promethazine = 15.0mg

[tex]\begin{gathered} D\text{ = }\frac{m}{V} \\ \\ \therefore V\text{ = }\frac{m}{D} \\ \\ \text{ = }\frac{15}{25} \\ \\ \text{ = 0.60 mL} \end{gathered}[/tex]

Answer:

The nurse will draw up 0.60 mL.

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